Shirabe
一端

一端いったん

Common Noun
English jmdict
1
noun (common) (futsuumeishi) one end;an end
2
noun (common) (futsuumeishi) part;fragment
彼が亡くなった責任の一端は私に有ります。
His death was partly my fault.

一端いっぱし

Noun Adverb
English jmdict
1
nouns which may take the genitive case particle 'no'adverb (fukushi) word usually written using kana alone fully fledged;full-fledged;proper;competent;qualified;full-grown
君はいっぱしの大人だ。
You are quite a man.