()

わく
verb (godan)
to well up, to spring forth, to surge
自動詞 intransitivenatureemotion
See also: () (boil)
Conjugation
AffirmativeNegative
Present()()かない
Present polite()きます()きません
Past()いた()かなかった
Past polite()きました()きませんでした
て form()いて()かなくて
ている present()いている()いていない
ている polite()いています()いていません
ている past()いていた()いていなかった
ている past polite()いていました()いていませんでした
Conditional ば()けば()かなければ
Conditional たら()いたら()かなかったら
Volitional()こう
Volitional polite()きましょう
Potential()ける()けない
Passive()かれる()かれない
Causative()かせる()かせない
Imperative()()くな
1. to well up, to spring forth, to gush out
For water, hot springs, or other liquids to emerge naturally from the ground.
Hot spring water wells up from here.
Spring water gushes out from the mountainside.
This area is known for its abundant groundwater springs.
2. to surge, to well up (emotions, ideas)
For feelings, thoughts, motivation, or interest to arise spontaneously from within.
やる()()いてきた。
I'm starting to feel motivated.
Hearing the story sparked my interest.
Listening to his speech, I felt courage welling up inside me.

Usage

Distinct from () (to boil), which is a homophone. ()く refers to things emerging from the ground or arising spontaneously, while () refers to liquid reaching boiling point or a crowd getting excited.

Often used with the compound ()() (to gush out, to spring forth) for emphasis.

Common collocations

Related Words