みっちり

adverb

thoroughly; intensively; rigorously

1. thoroughly; intensively; rigorously

Describes doing something with great thoroughness and intensity, leaving no gaps or shortcuts. Commonly used for training, studying, or working.

みっちり練習(れんしゅう)する。

To practice intensively.

先生(せんせい)にみっちり鍛(きた)えられた。

I was rigorously trained by my teacher.

試合(しあい)の前(まえ)に一週間(いっしゅうかん)みっちり特訓(とっくん)して本番(ほんばん)に備(そな)えた。

I trained intensively for a week before the match to prepare for the real thing.

2. tightly packed; crammed full

Describes something being filled to capacity with no space left.

スケジュールがみっちり詰(つ)まっている。

The schedule is packed tight.

箱(はこ)の中(なか)にみっちり荷物(にもつ)が入(はい)っている。

The box is crammed full of things.

朝(あさ)から晩(ばん)までみっちり予定(よてい)が入(はい)っていて、休(やす)む暇(ひま)がない。

From morning to night my schedule is packed solid, and I have no time to rest.

A mimetic adverb with two related senses: thorough intensity (for activities) and tight packing (for spaces/schedules). The common thread is the idea of leaving no gaps.

Common collocations

みっちり練習(れんしゅう)する: to practice intensively
みっちり鍛(きた)える: to train rigorously
みっちり勉強(べんきょう)する: to study thoroughly
みっちり詰(つ)まっている: to be packed tight
みっちり仕込(しこ)む: to train someone thoroughly

Similar words

しっかり: properly, thoroughly — broader usage, emphasizes doing things right
びっしり: densely packed, filled with — emphasizes visual density (text, schedules)
ぎっしり: jam-packed — emphasizes physical tightness of packing
徹底的(てっていてき)に: thoroughly — more formal equivalent for the "intensive" sense

Register

Informal but not overly casual. Common in everyday conversation, especially about training, studying, or busy schedules.

Related Words

Compare: しっかり (properly, thoroughly)

Compare: びっしり (densely packed, filled with)

Compare: ぎっしり (jam-packed)

Compare: 徹底的(てっていてき) (thoroughly)

general

Added 2026.3.30 1:21 · Revised 2026.9.2 13:01

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