conscience
con- ‘with’ + scire ‘know’
https://gyazo.com/90d26be11c657d425aa88e7ada0658c5
source: do it angel GIF by Jin - Find & Share on GIPHY
noun
an inner feeling or voice viewed as acting as a guide to the rightness or wrongness of one's behavior:
良心, 道義心, 善悪の判断力; 良心にしたがうこと; 後ろめたさ (!個人の良心を表す場合はa ～/one's ～(es); その際しばしば修飾語を伴う)
e.g. he had a guilty conscience about his desires
e.g. Ben was suffering a pang of conscience.
PHRASES
in (good) conscience
by any reasonable standard; by all that is fair: they have in conscience done all they could.
on one's conscience
weighing heavily and guiltily on one's mind: an act of providence had prevented him from having a death on his conscience.
DERIVATIVES
conscienceless | ˈkänSH(ə)nsləs | adjective
ORIGIN
Middle English (also in the sense ‘inner thoughts or knowledge’): via Old French from Latin conscientia, from conscient- ‘being privy to’, from the verb conscire, from con- ‘with’ + scire ‘know’.