くっする
kussuru

Suru Verb

1. to yield; to give in; to be daunted; to shrink

Intransitive
その要求 ようきゅう くっするな。
sono yōkyūni kussuruna.
Do not give in to those demands.
Suru Verb

2. to bend (knee, etc.)

Transitive
Suru Verb

3. to subdue; to overpower

Transitive
Suru Verb

4. to feel down

Intransitive
Archaic