捉
摸
不
定
z
h
u
ō
z
h
u
ō
m
ō
m
ō
b
ú
b
ù
d
ì
n
g
d
ì
n
g
Definitions
1. idiom. difficult to ascertain
2. unpredictable
Components
捉摸
zhuō mō
–
to fathom
不定
bù dìng
–
indefinite