Why do JLPT N5 learners confuse 危ない with 汚い?

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 危ない or 汚い more common on JLPT N5?

Both appear in the JLPT N5 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 Daily Life Nouns theme of N5 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 N5 · Beginner · Meaning confusion

危ない vs 汚い

Q: What's the difference between 危ない and 汚い?

危ない (あぶない) means "dangerous" and 汚い (きたない) means "dirty". Both are i-adjectives ending in '-nai' that describe negative or undesirable states. Learners often confuse the warning for 'danger' with the description of something being 'dirty' or 'messy.'

Why JLPT N5 learners mix up 危ない (あぶない, “dangerous”) and 汚い (きたない, “dirty”).

危ない

あぶない

dangerous

i-adjective

汚い

きたない

dirty

i-adjective

Theme: Daily Life NounsJLPT N5

Why these get confused

Both are i-adjectives ending in '-nai' that describe negative or undesirable states. Learners often confuse the warning for 'danger' with the description of something being 'dirty' or 'messy.'

How to tell them apart

Anchor on the meaning, not the form. 危ない (dangerous) and 汚い (dirty) 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

危ない (dangerous)

この道は危ないです。
危ないですから、気をつけてください。

汚い (dirty)

この部屋は汚いです。
手が汚いですから、洗ってください。

How JLPT tests this pair

On JLPT N5, 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

「危ない」の意味は？