aufpassen

Etymology
, a. The sense “to be attentive” is not borrowed from French (as is the verb stem passen) but a native development of Dutch.

Verb

 * 1)  to watch out, to be alert
 * 2)  to look after, to take care of
 * 3)  to be attentive
 * 1)  to be attentive
 * 1)  to be attentive
 * 1)  to be attentive