Why do JLPT N1 learners confuse 密接 with 合間?

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 密接 or 合間 more common on JLPT N1?

Both appear in the JLPT N1 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 General Adjectives (2) theme of N1 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 N1 · Advanced · Meaning confusion

密接 vs 合間

Q: What's the difference between 密接 and 合間?

密接 (みっせつ) means "related; connected; close; intimate" and 合間 (あいま) means "interval". Both define spatial or temporal positioning. 密接 describes a 'close' connection without gaps, while 合間 describes the 'interval' or gap itself. Their opposite meanings regarding 'space' can cause confusion in reading.

Why JLPT N1 learners mix up 密接 (みっせつ, “related; connected; close; intimate”) and 合間 (あいま, “interval”).

密接

みっせつ

related; connected; close; intimate

na-adjective

合間

あいま

interval

na-adjective

Theme: General Adjectives (2)JLPT N1

Why these get confused

Both define spatial or temporal positioning. 密接 describes a 'close' connection without gaps, while 合間 describes the 'interval' or gap itself. Their opposite meanings regarding 'space' can cause confusion in reading.

How to tell them apart

Anchor on the meaning, not the form. 密接 (related; connected; close; intimate) and 合間 (interval) 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

密接 (related; connected; close; intimate)

需要と供給の間には密接な関係がある。
この問題はあの問題と密接に関連している。

合間 (interval)

木立の合間から家が見えます。
木立の合間から家が見えます。

How JLPT tests this pair

On JLPT N1, 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

「密接」の意味は？