1. (

• temperamental

) relating to or caused by temperament; "temperamental indifference to neatness"; "temperamental peculiarities" ;

2. (

• moody ,
• temperamental

) subject to sharply varying moods; "a temperamental opera singer" ;

3. (

• erratic ,
• temperamental

) 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 ;