“Insincere” in Japanese
Short answer
Insincere in Japanese is “不真面目” (fumajime). Full meaning: not serious, frivolous, insincere, unsteady.
Other ways to say “Insincere” in Japanese
浮薄
fuhaku frivolous, fickle, insincere, caprice, cold-heartedness
心にもない
kokoronimonai (something) one does not really mean, insincere
口先だけ
kuchisakidake all talk, glib, insincere, empty, specious
軽薄
keihaku frivolous, flippant, superficial, shallow, trifling, insincere
ふまじめ
fumajime not serious, frivolous, insincere, unsteady
フマジメ
fumajime not serious, frivolous, insincere, unsteady
ふはく
fuhaku frivolous, fickle, insincere, caprice, cold-heartedness
不まじめ
fumajime not serious, frivolous, insincere, unsteady
通り一遍
tooriippen perfunctory, cursory, passing, conventional, formal (greetings, compliments, etc.), casual (acquaintance, remark, etc.), superficial, insincere; chance (e.g. customer), transient, stray
けいはく
keihaku frivolous, flippant, superficial, shallow, trifling, insincere
空
kara emptiness, being empty; not carrying anything, unburdened, empty-handed; dishonoured (bill, promise, etc.), false, no-show (reservation), put-on (cheeriness, courage, etc.), empty (compliments), insincere
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