Correct

解手

/ jiěshǒu / 
Strokes

Definition

to relieve oneself (i.e. use the toilet)/to solve

Example

As a Verb

relieve oneself; go to the toilet/lavatory; pay a call of nature

1
Xiè
解
xiǎo
小
shǒu
手

urinate; pass/make water; take/have a leak

2
Xiè
解
dà
大
shǒu
手

defecate; have bowel movement

As a Verb

part company