もっともらしい
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Meanings
I-adjective
1. plausible; believable (Usually kana)
2. solemn; dignified; serious (Usually kana)
Other spellings
尤もっともらしい
Kanji in other spellings
Pitch accent
もっともらしい
Used in vocabulary
もっともらしい顔かお
dignified expression; solemn expression; serious expression
Expression
Examples3
Your explanation sounds plausible, but it just doesn't hold water.
His story sounds true.
He did a real snow job on my daughter.