After and behind with

The kanji locates something after a reference point in time or behind it in space. It also expresses falling behind.

Etymology

Etymology Research

Kanjipedia’s account, credited to Kadokawa’s Shinjigen, classifies 後 as a semantic compound. It analyzes 彳 with a foot component written 夂 and 幺 understood as binding. Bound feet cannot advance, giving “fall behind”, then “after” and “behind”. The existing explanation accurately reflects this source’s main account, though “binding” explains 幺’s proposed role more precisely than the bare label “thread”. Kanjipedia, 後

CUHK identifies an early oracle-bone form with 幺 and a foot-shaped 夂, followed by the addition of 彳 to mark walking. It attributes the tied-foot interpretation to Lin Yiguang, while noting that Liu Zhao and He Linyi instead treat 幺 as phonetic. Bronze and Warring States forms sometimes use 辵 in place of 彳. These alternatives prevent a firm claim that every component was purely semantic. CUHK, Multi-function Chinese Character Database, 後

CUHK separates several attested uses. Oracle-bone text 屯南 2358 uses 後 for temporal order. The bronze 杕氏壺 uses it for lagging behind; 小臣單觶 uses it for temporal succession. Bronze inscriptions also use 後人 and 後嗣 for descendants, with 後 alone sometimes carrying that sense. These attestations establish early meanings, without proving one uninterrupted path of development. CUHK, 後

Heibonsha’s Jitsu offers another interpretation. It writes the foot component as 夊 and cites Shuowen’s gloss “slow”. It reports Duan Yucai’s explanation through small feet and childhood, then proposes that bronze variants concern a ritual, possibly a prayer for an enemy to retreat. Jitsu presents that ritual account tentatively. It should remain attributed rather than merged into the tied-foot explanation. Heibonsha, Jitsu, 後

The unresolved issue is the original role of 幺 and the precise scene, if any, represented by the earliest graph. The sources consulted do not settle it. A proposed phonetic role for 幺 does not supply a rule for choosing modern Japanese ゴ or コウ. The character’s Chinese formation also does not establish the origins of the native Japanese words あと, のち, うしろ, or おくれる.

Later in Time

(From now on)

今後(こんご) means from now on or in the future.

It combines (now) with 後 (after) to show what comes after now.

Manga panel from ご注文はうさぎですか? showing example of Better to give up fortune telling with 〜た+方がいい.
ご注文はうさぎですか? » Volume 1 » Page 100

Cocoa did fortune telling for her friends, only for all their fortunes to happen to her in a bad way.

チノ:
「ココアさんは(ひと)不幸(ふこう)身代(みが)わりになる才能(さいのう)があるんですか?」
“Cocoa, do you have a talent for taking on other people's misfortune?”
リゼ:
今後(こんご)(うらな)いやめた(ほう)がいいぞ自分(じぶん)のために」
“For your own sake, you had better stop fortune telling from now on.”
ココア:
「なんで!?」
“Why!?”
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(After school)

放課後(ほうかご) means after school. It refers to the period following the end of classes.

It combines 放課 (dismissal from class) with 後 (after) to show the time after classes end.

Manga panel from 俺物語!! showing example of A schoolyard chicken coop with 小屋.
俺物語!! » Volume 4 » Page 165

After Takeo (Gouda) has helped her out multiple times, Saijou considers confessing her feelings to him. She waits for him near the shoe lockers before class.

西城(さいじょう):
「あのっ 今日(きょう)剛田(ごうだ)(はなし)があるんだ」
“Um... I need to talk to you today.”
放課後(ほうかご)ニワトリ小屋(ごや)(まえ)()てくれるかな」
“Could you come to the chicken coop after school?”
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Position and Order

(Last)

最後(さいご) means the end, the last one, or the final stage.

It combines 最 (most) with 後 (after) to show the furthest point after all others.

Manga panel from あしたは土曜日 showing example of That said, she'll still show her homework with 〜つつも.
あしたは土曜日 » Volume 春・夏 » Page 122

As summer break is half over, talk of summer homework comes up. Yukari says she won’t let Mina copy off of hers.

ミナ:
「まぁそんなこと()いつつ最後(さいご)には()せてくれるよね」
“Well, even though she says that, she'll show it to me in the end, you know.”
サナエ:
学級委員長(がっきゅういいん)だしね」
“She is the class representative, after all.”
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People Who Come Later

(Junior)

後輩(こうはい) is a junior in the same school, workplace, or group, usually someone who joined later or has less experience.

It combines 後 (later) with 輩 (person of a group) to show a person who came later.

Manga panel from からかい上手の高木さん showing example of A junior or something with 〜か何か.
からかい上手の高木さん » Volume 17 » Page 84

On a nighttime walk, Hamaguchi sees Hokujou casually dressed and wearing glasses. She’s fine with Hamaguchi seeing her like this, as they’ve known each other for a long time, but she tells him not to tell their classmates. At school the next morning…

高尾(たかお):
「おい 昨日(きのう)浜口(はまぐち)が、メガネ女子(じょし)(よる)()ってたらしいぞ!」
“Hey, I heard Hamaguchi was hanging out with a girl in glasses last night!”
生徒(せいと)A:
()()子供(こども)っぽかったって()いたぞ。」
“I heard she looked kind of childish.”
生徒(せいと)B:
後輩(こうはい)(なに)かか、浜口(はまぐち)。」
“Is she a junior or something, Hamaguchi?”
浜口(はまぐち):
「い… いやー…」
“Uh... well...”
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