Origins and main things with

The kanji has the core meanings of root, origin, and main. Its readings are ホン and もと.

Etymology

This kanji is an ideogram built from 木 (tree) with an extra mark at the bottom to indicate the root.

Etymology Research

Kanjipedia’s account from Kadokawa’s Shinjigen classifies 本 as 指事(しじ), a graph that indicates a meaning by marking a location. The added line has a pointing function, so this analysis does not assign it a phonetic role. Kanjipedia

The Chinese University of Hong Kong agrees on the original meaning, the root of a plant. Its quoted Shuowen entry records 楍 as an old form. The database displays small-seal and bamboo or silk manuscript forms, but its 本 entry supplies no oracle-bone or bronze examples. This is a limit of the entry, not evidence that the character was absent from those periods. CUHK, Multi-function Chinese Character Database

CUHK cites plant roots in the Lüshi Chunqiu, a tree trunk in the Zhuangzi, and a root cause in the Guoyu. It also records a draft manuscript sense in the Nanshi. These textual examples show physical and abstract uses; they do not date every transition or prove a complete route to the modern Japanese word for a book. CUHK

Book

(Bookstore)

本屋(ほんや) means a bookstore or bookseller.

It combines 本 (book) with (shop) to show a shop for books.

Manga panel from この美術部には問題がある! showing example of Covered in books with 〜だらけ.
この美術部には問題がある! » Volume 8 » Page 94

Upon hearing Usami say she’s stopping by the school library, Uchimaki says he wants to go with, and Colette tags along.

内巻(うちまき):
(ほん)だらけだ!!」
“It's nothing but books!!”
コレット:
本屋(ほんや)さんみたいだ!!」
“It's like a book store!!”
宇佐美(うさみ):
2人(ふたり)とも(しず)かにしなさい」
“Quiet down, you two.”
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Genuine

(Truth)

本当(ほんとう) means truth, real, or really.

It combines 本 (true origin) with 当 (right / fitting) to show what is truly right.

Manga panel from カードキャプターさくら showing example of Chinese history lesson on talismans with 中国.
カードキャプターさくら » Volume 3 » Page 158

Sakura had to take a detour to get to class. She tells her friends at school about the shrine she saw along the way. Naoko says the talismans from there are popular, as they can grant wishes for things such as exams and romance.

山崎(やまざき):
「お(まも)りっていうのはね むかし 中国(ちゅうごく)(まも)(ふだ)(ふくろ)にいれたのがはじまりらしいよ」
“You know, apparently good-luck charms began long ago in China, when people put protective talismans into bags.”
奈緒子(なおこ):
今回(こんかい)本当(ほんとう)っぽいね」
“This time it sounds true, huh?”
千春(ちはる):
「まだ わかんないわよ」
“We don't know that yet!”
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(Real thing)

本物(ほんもの) means the real thing or genuine article. It contrasts with copies, fakes, or imitations.

It combines 本 (real / original) with (thing) to show the genuine thing.

Manga panel from ご注文はうさぎですか? showing example of Too cute pajamas with 〜すぎる.
ご注文はうさぎですか? » Volume 1 » Page 70

Chiya and Syaro unexpectedly have to stay the night at Chino’s home.

シャロ:
「チノちゃんにパジャマ()りたのはいいけどちょっとかわいすぎない?」
“Borrowing pajamas from Chino-chan is fine, but aren't they a little too cute?”
「いつもはジャージなのに」
“Even though she usually wears a tracksuit.”
千夜(ちや):
本物(ほんもの)のお嬢様(じょうさま)みたい♪」
“You look like a real young lady♪”
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(Today)

本日(ほんじつ) is a formal word for today, common in announcements and customer service.

It combines 本 (this / present / main) with 日 (day) to show the present day.

Manga panel from 名探偵コナン showing example of Coming all the way up here in the mountains with 足を運ぶ.
名探偵コナン » Volume 9 » Page 115

A large gathering takes place in a mansion deep in the mountains, in celebration of Reika, daughter of the head of Yotsui Group. After Reika blows out the candles on her birthday cake, her father congratulates her on turning 24, then he turns and addresses their guests.

(よつ)():
本日(ほんじつ)(むすめ)のためにわざわざこんな山奥(やまおく)まで(あし)(はこ)んでいただき、感謝(かんしゃ)(ねん)にたえません!!」
“I can't thank you enough for coming all the way up here in the mountains today for my daughter!”
今後(こんご)(むすめ)共々(ともども)()(よつ)()グループをどうぞよろしく!!」
“Please continue to be favorable to both my daughter and my Yotsui Group in the future!”
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Foundation

(Basics)

基本(きほん) means the basics, fundamentals, or foundation of something.

It combines 基 (foundation) with 本 (main / origin) to show the main foundation.

Manga panel from くノ一ツバキの胸の内 showing example of Precisely because of the fundamentals with 〜からこそ.
くノ一ツバキの胸の内 » Volume 5 » Page 120

During a training session, Tsubaki quickly subdues Asagao. Sazanka uses this opportunity to launch a surprise attack, only for Tsubaki to anticipate it and take her down as well.

ツバキ:
不意(ふい)をつくばかりじゃダメです。」
“You can't rely just on surprise attacks.”
基本(きほん)があるからこそ奇襲(きしゅう)()きるんです。」
“It's precisely from having fundamentals that surprise attacks become effective.”
サザンカ:
「はい…」
“Yeah...”
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(Instinct)

本能(ほんのう) means instinct, an inborn impulse that drives behavior without conscious thought or learning.

It combines 本 (origin) with (ability) to show innate capability.

Manga panel from 三ツ星カラーズ showing example of A cat's natural instinct with 本能.
三ツ星カラーズ » Volume 7 » Page 20

Yui and her friends are in their secret base when a pigeon flies in and lands on the table between them. The group’s cat, Colonel Monochrome, leaps after it, but the pigeon escapes.

結衣(ゆい):
「ビックリしたー」
“That surprised me!”
琴葉(ことは):
大佐(たいさ)本能(ほんのう)をむき()しにしたな」
“The Colonel laid bare his instincts.”
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(Headquarters)

本部(ほんぶ) means the headquarters or central governing office of an organization.

It combines 本 (main) with (department) to show the main department.

Manga panel from ARIA The MASTERPIECE showing example of No time to return to headquarters with 本部.
ARIA The MASTERPIECE » Volume 3 » Page 286

Akari encounters Woody while he’s out on a delivery run. He stopped to show off for some kids, but in the process, he seems to have lost his city map, and he has a terrible sense of direction. Akari asks if he has the delivery addresses, which he says he does.

ウッディー:
「でも 本部(ほんぶ)まで地図(ちず)()りに(もど)時間(じかん)がないのだぁ!」
“But I don't have time to go back to headquarters to get a map!!”
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