half a mind

Noun

idiomatic informal uncountable

(informal, idiomatic) A moderate inclination.

Japanese Meaning

ほんのわずかな気持ち、ちょっとやってみようかという程度の気向き

I have half a mind to tell him the truth, even though it might upset him.

彼を動揺させるかもしれないが、私は彼に本当のことを話そうという気が半分ある。

Sense（1）

(informal, idiomatic) A moderate inclination.

His behaviour gives me half a mind to throw him out.