Correct

勃起

/ bóqǐ / 
Strokes

Definition

erection/to have an erection

Example

As a Verb

have/get erection

1
Bù
不
néng
能
bóqǐ
勃起

lose erection

2
Nánxìng
男性
bóqǐ
勃起
gōngnéng
功能
zhàngài
障碍

erectile dysfunction (ED)

3
Bóqǐ
勃起
bù
不
jiān
坚

soft erection