noun
woodlouse; pill bug; slater
Common terrestrial isopod often found in damp places; the name comes from its resemblance to a straw sandal (草鞋).
庭の石の下にワラジムシがたくさんいた。
There were many woodlice under the stones in the garden.
ワラジムシは湿った場所を好む。
Woodlice prefer damp places.
ダンゴムシ (pill bug) can roll into a ball, while ワラジムシ cannot.
From 草鞋 (わらじ, straw sandal) + 虫 (むし, insect), referring to the insect's shape resembling a straw sandal.