noun which may take the genitive case particle 'no', noun
so trifling; so trivial; that little
Expresses that something is so small, insignificant, or trivial that it is not worth worrying about. Often used dismissively or to downplay a matter.
あれしきのことで怒るなんて、大人げない。
Getting angry over such a trifling matter is childish.
あれしきの雨なら、傘はいらないよ。
If it's just that little rain, I don't need an umbrella.
Derived from the demonstrative あれ (that over there) and しき, an old suffix meaning 'extent' or 'degree'. The exact historical development is uncertain, but the word is used as a fixed expression in modern Japanese.