to walk carefully (step by step); to grope one's way
to trace; to track; to detect
to check carefully

dẫu
conj

(literary) although; despite; in spite of

to sing (a baby) to sleep

(literary, dated) final particle used for negation or to form rhetorical questions

to go mad, to go crazy, to become insane

adj

crazy, insane

to ask (someone to do something with you); to invite