Why do JLPT N4 learners confuse 一生懸命 with 不便?

Both words occupy adjacent semantic territory, which is exactly why the JLPT uses them as distractors for each other on multiple-choice items. The fastest way to stop confusing them is to study them as a pair, write a one-sentence contrast in your own words, and drill the pair specifically rather than each word in isolation.

Is 一生懸命 or 不便 more common on JLPT N4?

Both appear in the JLPT N4 curriculum and either may show up on a given exam. Don't try to predict which one the test will choose — learn to distinguish them and you'll be safe regardless. Both belong to the Emotions & Adjectives theme of N4 vocabulary.

How do I practice this confusion pair?

Free option: visit /try and pick a confusion drill. Paid option: none — JLPT Mastery is free during launch. Whichever route you take, the engine specifically re-tests pairs you've gotten wrong rather than rotating through general vocabulary review.

JLPT N4 · Elementary · Meaning confusion

一生懸命 vs 不便

Q: What's the difference between 一生懸命 and 不便?

一生懸命 (いっしょうけんめい) means "very hard (as in "to work hard"), with utmost effort" and 不便 (ふべん) means "inconvenience". Both are multi-kanji na-adjectives. A learner might associate the 'inconvenience' (不便) of a difficult task with the 'extreme effort' (一生懸命) required to overcome that difficulty.

Why JLPT N4 learners mix up 一生懸命 (いっしょうけんめい, “very hard (as in "to work hard"), with utmost effort”) and 不便 (ふべん, “inconvenience”).

一生懸命

いっしょうけんめい

very hard (as in "to work hard"), with utmost effort

na-adjective

不便

ふべん

inconvenience

na-adjective

Theme: Emotions & AdjectivesJLPT N4

Why these get confused

Both are multi-kanji na-adjectives. A learner might associate the 'inconvenience' (不便) of a difficult task with the 'extreme effort' (一生懸命) required to overcome that difficulty.

How to tell them apart

Anchor on the meaning, not the form. 一生懸命 (very hard (as in "to work hard"), with utmost effort) and 不便 (inconvenience) live in adjacent semantic territory. Memorize the boundary, not just each word.
Read the example sentences below. Seeing each word in its natural context builds a faster lookup than studying the dictionary form alone.

In a sentence

一生懸命 (very hard (as in "to work hard"), with utmost effort)

一生懸命働いた。
一生懸命働いた。

不便 (inconvenience)

電話がないのは不便だ。
ご不便をおかけして申し訳ありません。

How JLPT tests this pair

On JLPT N4, this pair shows up as a vocabulary meaning question. You see one word and pick its English equivalent from four options — one of which will be the other word in this pair, chosen as a distractor precisely because of the overlap.

Sample item

「一生懸命」の意味は？

A. very hard (as in "to work hard"), with utmost effort (correct)
B. inconvenience (distractor)
C. (other plausible meaning)
D. (other plausible meaning)

Drill this pair until it sticks

Reading the explanation is step one. Targeted practice is what actually moves a confusion pair out of your weak list. Free, no signup needed to try.

Practice N4 confusion pairs

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Meaning confusion · Emotions & Adjectives

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Both are common na-adjectives used for situational evaluation. One is positive ('simple' - kantan) and the other is negative ('inconvenient' - fuben), leading to confusion among beginners.

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Meaning confusion · Emotions & Adjectives

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See explanation →

Meaning confusion · Emotions & Adjectives

無理 vs 不便

Both express negative situational evaluations. Learners often mix up 'impossible/unreasonable' (muri) with 'inconvenient' (fuben) when a situation is not going according to plan.

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Frequently asked

一生懸命 vs 不便

Why JLPT N4 learners mix up 一生懸命 (いっしょうけんめい, “very hard (as in "to work hard"), with utmost effort”) and 不便 (ふべん, “inconvenience”).

一生懸命

いっしょうけんめい

very hard (as in "to work hard"), with utmost effort

na-adjective

不便

ふべん

inconvenience

na-adjective

Theme: Emotions & AdjectivesJLPT N4

Why these get confused

Both are multi-kanji na-adjectives. A learner might associate the 'inconvenience' (不便) of a difficult task with the 'extreme effort' (一生懸命) required to overcome that difficulty.

How to tell them apart

Anchor on the meaning, not the form. 一生懸命 (very hard (as in "to work hard"), with utmost effort) and 不便 (inconvenience) live in adjacent semantic territory. Memorize the boundary, not just each word.
Read the example sentences below. Seeing each word in its natural context builds a faster lookup than studying the dictionary form alone.