Correct

歹毒

/ dǎidú / 
Strokes

Definition

vicious/ruthless/malevolent

Example

As an Adjective

malicious; vicious; malignant

1
Yòngxīn
用心
dǎidú
歹毒

have sinister motives; nurse ill intentions

2
Xīncháng
心肠
dǎidú
歹毒

be ill-hearted; be malicious