s
1
u
1
b
3
o
1
p
3
t
1
i
1
m
3
i
1
z
10
a
1
t
1
i
1
o
1
n
1
15 letters ·
30 points in Scrabble
Meaning
originEtymology tree Proto-Indo-European *upó Proto-Italic *supo Latin sub Latin sub-der. English sub- English optimization English suboptimization From sub- + optimization.