простой

Etymology 1
, from.

Adjective

 * 1) simple, ordinary
 * 2) basic
 * 3)  prime
 * 4)  simple, simplex
 * 1)  simple, simplex
 * 1)  simple, simplex

Etymology 2
From.

Noun

 * 1) standstill, stoppage, idle time, downtime