u 1 n 1 p 3 r 1 e 1 d 2 i 1 c 3 t 1 a 1 b 3 i 1 l 1 i 1 t 1 i 1 e 1 s 1
18 letters · 25 points in Scrabble
Meaning
noun the quality of being guided by sudden unpredictable impulses
noun the trait of being unpredictably irresolute
noun lacking predictability