verb / noun
heed
HEED/hiːd/
Careful attention to something.
He heeds the warning and steps back from the broken bridge.

Etymology
Old English hēdan covered both paying attention and taking care of or protecting something. Heeding advice or warnings preserves that attentive-care sense: giving what is said careful regard.
In context
this dream to be a warning from the unconscious. He implored his colleague to take extra precautions on any future climbs or avoid them altogether. But the man did not heed the advice.