chuǎi mó
v. try to fathom, try to figure out
You can also

Simplified Chinese

Traditional Chinese

Simplified stroke orders are based on the 'Standard of National Commonly-used Mandarin Chinese Characters (现代汉语通用字笔顺规范)', issued by the China National Language and Character Working Committee (国家语言文字工作委员会) on April 7th 1997. Traditional stroke orders are based on information issued by the Taiwan Ministry of Education.
wó jiǎn zhí chuǎi mó bú tòu tā de yòng yì
phr. I simply couldn't figure out his intention.