unnatural
Cross references:
1. irregular
un.nat.u.ral \.*n-'nach-(*-)r*l, '*n-\ \-'nach-(*-)r*-le-, -'nach-*r-le-\
\-'nach-(*-)r*l-n*s\ aj 1: not being in accordance with nature or
consistent with a normal course of events 2a: not being in accordance with
normal feelings or behavior : PERVER SE, ABNORMAL 2b: ARTIFICIAL, CONTRIVED
2c: STRANGE, IRREGULAR - un.nat.u.ral.ly av
Webster's English Dictionary