軽かる々がるしい

i-adjective

rash; thoughtless; frivolous

Describes acting or speaking without due consideration, often with a nuance of being too casual or lacking seriousness.

• 彼かれの軽かる々がるしい発はつ言げんが問もん題だいになった。

  His thoughtless remark caused a problem.

• そんな軽かる々がるしい態たい度どでは信しん頼らいされない。

  You won't be trusted with such a frivolous attitude.