[in.sou.ci.ance] n [F, fr. in- + soucier to trouble, disturb, fr. L sollicitare--more at solicit] (1799): lighthearted unconcern: nonchalance -- in.sou.ci.ant adj -- in.sou.ci.ant.ly adv
INSOUCIANCE
Meaning of INSOUCIANCE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012