Shirabe
尤もらしい
Common Adverb
English jmdict
1
adverb (fukushi) most;extremely
Ken runs fastest of the three.
Other forms
Common conjunction
English jmdict
1
conjunction word usually written using kana alone but then;although;though
2
adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi) word usually written using kana alone reasonable;natural;just
He may well respect the artist.
Common adjective (keiyoushi)
English jmdict
1
adjective (keiyoushi) word usually written using kana alone plausible;believable
Your explanation sounds plausible, but it just doesn't hold water.
2
adjective (keiyoushi) word usually written using kana alone solemn;dignified;serious