()(くず)

きりくずす
verb (godan)
to cut into, to erode, to break down
他動詞 transitiveaction
Conjugation
AffirmativeNegative
Present()(くず)()(くず)さない
Present polite()(くず)します()(くず)しません
Past()(くず)した()(くず)さなかった
Past polite()(くず)しました()(くず)しませんでした
て form()(くず)して()(くず)さなくて
ている present()(くず)している()(くず)していない
ている polite()(くず)しています()(くず)していません
ている past()(くず)していた()(くず)していなかった
ている past polite()(くず)していました()(くず)していませんでした
Conditional ば()(くず)せば()(くず)さなければ
Conditional たら()(くず)したら()(くず)さなかったら
Volitional()(くず)そう
Volitional polite()(くず)しましょう
Potential()(くず)せる()(くず)せない
Passive()(くず)される()(くず)されない
Causative()(くず)させる()(くず)させない
Imperative()(くず)()(くず)すな
1. to cut into, to excavate
To cut into something and break it apart, especially terrain or material.
(やま)()(くず)して道路(どうろ)(つく)った
They cut into the mountain to build a road.
(おか)()(くず)して平地(へいち)した
They excavated the hill and leveled it.
Cut into the cliff and haul out the earth and sand.
They cut into the slope to develop residential land.
Construction to excavate part of the mountain for a tunnel has begun.
2. to draw on, to dip into (savings)
To gradually use up saved resources; to spend money from savings.
I'm living by dipping into my savings.
退職金(たいしょくきん)()(くず)さないようにしたい
I want to avoid eating into my retirement fund.
I'm living while gradually depleting my assets.
定期(ていき)預金(よきん)()(くず)すしかない。
I have no choice but to dip into my fixed deposit.
I want to be able to live without dipping into my inheritance.
We drew on our reserves to respond to the disaster.
3. to break up, to undermine
To weaken or divide something from within; to erode support or unity.
It's a strategy to break up the opposing camp.
(てき)防御(ぼうぎょ)()(くず)す。
To break down the enemy's defense.
They undermined the opposition and gained approval.
組織(そしき)結束(けっそく)()(くず)そうした
They tried to break up the unity of the organization.
It's a strategy to undermine the opponent's confidence.

()(くず)す is a compound verb: () (to cut) + (くず) (to crumble). The two together give the image of breaking something down piece by piece, which is why the verb covers both physical excavation (sense 1) and the gradual depletion of a resource (sense 2) or of a group's unity (sense 3).

Transitivity

Transitive (他動詞(たどうし)). Pattern: X()(くず)す.

ASPECT (ている):
()(くず)している describes the action in progress, and in sense 2 it is the normal form for an ongoing situation — 貯金(ちょきん)()(くず)している ('I am living off my savings').

Common patterns