Boundaries and limits with

means “limit”, “boundary”, or “scope”. It is used in words establishing standards or defining limits.

Etymology

This kanji is a phono-semantic compound comprised of 阝 / 阜 (mound, embankment) as the semantic component and 艮 (a person looking back) as the phonetic component, giving the on-reading ゲン. These invoke imagery of reaching the edge of an embankment and being forced to stop there.

Boundaries

(Limit)

限界(げんかい) means the absolute boundary, limit, or maximum ceiling of an action, ability, range, or degree, signifying the point where “nothing more is possible” or “there is no going beyond this”.

It combines 限 (limit) with (boundary) to show a boundary line.

Manga panel from あしたは土曜日 showing example of At one's limit with 限界.
あしたは土曜日 » Volume 秋・冬 » Page 16

Mina wants to hurry and eat her lunch, as she’s very hungry. Yukari reminders her they still have one more class first.

ミナ:
「もう限界(げんかい)だよ!こんなんじゃ(つぎ)授業(じゅぎょう)集中(しゅうちゅう)できないよー。」
“I'm already at my limit! As things are, come next class I won't be able to concentrate.”
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Restrictions and Controls

(Limitation)

限定(げんてい) refers to restricting the scope, quantity, or target to a specific range. It is used to narrow down certain conditions in order to distinguish or restrict them from others.

It combines 限 (limit) with 定 (fix) to show something fixed within clear bounds.

Manga panel from 俺物語!! showing example of Limited edition with 限定.
俺物語!! » Volume 6 » Page 103

Takeo and Rinko meet up after school and stop somewhere for a drink and to chat. Rinko brings up February 14th, which is right around the corner.

凛子(りんこ):
「もうすぐバレンタインだから限定(げんてい)チョコいっぱい()てるよねー」
“Since it's almost Valentine's, a lot of limited edition chocolates have come out.”
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(Restriction)

制限(せいげん) refers to the act of setting a certain limit or scope and preventing anything from exceeding it, or to the established scope or limit itself.

It combines 制 (control) with 限 (limit) to show a limit imposed by control.

Manga panel from 俺物語!! showing example of Limited amusement park admission with 入場制限.
俺物語!! » Volume 4 » Page 50

Takeo and his friends board the train bound for the amusement park, MM Land.

凛子(りんこ):
「すっごい(ひと)だね。みんなMMランド()くのかな」
“There's a lot of people here. I wonder if everyone's going to MM Land.”
隼人(はやと):
連休(れんきゅう)だから()むよねー」
“It's a long holiday, so it'll be crowded.”
(あい):
入場(にゅうじょう)制限(せいげん)とかなんないといーけど」
“I hope they don't restrict admission or anything.”
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Time Boundaries

(Curfew)

門限(もんげん) refers to the “specified time by which one must return home from being out” or the “time when gates or entrances are closed”, typically at night. Curfews are established in homes, student dormitories, hotels, and other settings for the purposes of crime prevention and lifestyle guidance.

It combines 門 (gate) with 限 (limit) to show the time limit of the gate.

Manga panel from 三ツ星カラーズ showing example of Case closed at curfew time with 門限.
三ツ星カラーズ » Volume 4 » Page 78

After finding evidence of a UFO encounter, the group Colors sets out to find aliens. The case is cut short when the 5PM bell chimes, signalling that the young trio has to head home for the day.

斎藤(さいとう):
「ああ門限(もんげん)か。ゲームオーバーだな」
“Ah, curfew time? I suppose it's Game Over.”
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(Time limit)

時限(じげん) is a term that refers to the division of time or a period, or to a specific, defined period of time resulting from such a division.

It combines (time) with 限 (limit) to show a time boundary or fixed time period.

Manga panel from 名探偵コナン showing example of Power switch pulled by a timing device with 時限装置.
名探偵コナン » Volume 3 » Page 79

Two murders on a yacht leave the passengers on edge. A blackout occurs followed by another attempted murder. This should narrow down the list of suspects to those who weren’t gathered in the dining room. However, Detective Kogoro finds the power switch had a weight tied to it by rope, with a candle having burned the rope to drop the weight. This allowed the power to be turned off unattended.

小五郎(こごろう):
一種(いっしゅ)時限(じげん)装置(そうち)です」
“It's a timing device of sorts.”
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(Deadline)

期限(きげん) refers to a predetermined period of time or the “final date and time” by which something must be completed. Generally, if this deadline is missed, the matter becomes invalid or penalties may apply.

It combines 期 (set time) with 限 (limit) to show a fixed time boundary or deadline.

Manga panel from からかい上手の高木さん showing example of Challenge deadline with 期限.
からかい上手の高木さん » Volume 4 » Page 49

During their walk home after school, Takagi presents Nishikata with an impossible challenge. When he pushes back against it, she comes up with a new challenge, which Nishikata loses. As the two reach the point where they part ways, Takagi stops for a moment.

高木(たかぎ):
「あの勝負(しょうぶ)期限(きげん)ないからね。」
“There's no deadline for that challenge.”
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