HSK C4/W3/V7-9
Correct

炼

/ liàn / 
Strokes

Definition

to refine/to smelt

Example

As a Verb

smelt; refine

1
Liàn
炼
táng
糖

refine sugar

2
Liàn
炼
qiān
铅
  
/
tóng
铜
  
/
xī
锡

smelt lead/copper/tin

As a Verb

polish the wording; weigh one's word

As a Verb

temper; test