身軽みがる
migaru

na-Adjective

1. agile; nimble; light (of foot)

らえることのできないもの、身軽みがる素早すばやいもののたとえ、だそうです。
toraeru kotono dekinai mono migarude subayaimonono tatoe dasōdesu.
It's apparently a metaphor for something uncatchable, light of body and fleet of foot.
na-Adjective

2. casual (clothing); light (e.g. luggage)

na-Adjective

3. carefree; with limited responsibility

Other forms: