Correct

弛缓

/ chí huǎn / 
Strokes

Definition

to relax/to slacken/relaxation (in nuclear magnetic resonance)

Example

As a Verb

calm down; slow down; relax

1
Shìjiè
世界
jǐnzhāng
紧张
júshì
局势
yǐ
已
qū
趋
chíhuǎn
弛缓
  
。

World tension has eased off.

As an Adjective

lax

2
Jìlǜ
纪律
chíhuǎn
弛缓

be lax in enforcing/maintaining/observing discipline