простой
In English, простой has 3 different meanings When used as adjective it is simple, ordinary but it can also mean basic, prime or even simple, simplex It can only be used as noun meaning standstill, stoppage, idle time, downtime It can only be used as verb meaning second-person singular imperative perfective of простоя́ть (prostojátʹ)
It evolved from 2 origins. Comes from Proto-Slavic *prostъ. Comes from From проста́ивать .