sī​kǎo HSK4

to ponder

思考 sī​kǎo
to ponder verb
to think deeply about something; to reflect on or consider a matter seriously

He's thinking about this difficult problem.

thought noun
the process or act of thinking; serious mental activity involving analysis and judgment, or reasoning

Thinking is dangerous.

Frequency

Movie subtitles
36.2 per million appears in 14% of films
Written text
52.6 per million

Details

HSK 2.0
Level 5
HSK 3.0
Level 4

Sources