[ren4 yi4] /arbitrary/at will/at random/
  [ren4 yi4] /beliebig (u.E.) (Adj)/gerade richtig (u.E.) (Adj)/nach Belieben (u.E.) (Adj)/nach eigene Vorstellung (u.E.) (Adj)/nach eigenem Wunsch (u.E.) (Adj)/
  [ren4 yi4] /à sa guise/
 [にんい] /(adj-no,adj-na,n) (1) optional/voluntary/arbitrary/random/discretionary/facultative/spontaneous/any/(2) {math} arbitrary/(P)/EntL1467160X/
Visszatérés a(z) „任意” laphoz.