Temperamental
WordNet

adjective


(1)   Likely to perform unpredictably
"Erratic winds are the bane of a sailor"
"A temperamental motor; sometimes it would start and sometimes it wouldn't"
"That beautiful but temperamental instrument the flute"- Osbert Lancaster
(2)   Subject to sharply varying moods
"A temperamental opera singer"
(3)   Relating to or caused by temperament
"Temperamental indifference to neatness"
"Temperamental peculiarities"
WiktionaryText

Adjective



  1. of, related to, or caused by temperament
  2. subject to changing and unpredictable emotional states; moody, capricious; sometimes used figuratively to describe user-unfriendly or unstable machines or software that are either complicated and/or have poorly written instructions and are subsequently difficult to operate.
 
x
OK