stare (v.)

Old English starian "to stare, gaze, look fixedly at," from Proto-Germanic *staren "be rigid" (source also of Old Norse stara, Middle Low German and Middle Dutch staren, Old High German staren, German starren "to stare at;" German starren "to stiffen," starr "stiff;" Old Norse storr "proud;" Old High German storren "to stand out, project;" Gothic andstaurran "to be obstinate"), from PIE root *ster- (1) "stiff."

Not originally implying rudeness. To stare (someone) down is from 1848. Related: Stared; staring.

stare (n.1)

late 14c., "power of sight," from stare (v.). From c. 1700 as "a fixed gaze."

stare (n.2)

"starling," from Old English (see starling).

Others are reading

Definitions of stare from WordNet
stare (v.)
look at with fixed eyes;
The students stared at the teacher with amazement
Synonyms: gaze
stare (v.)
fixate one's eyes;
stare (n.)
a fixed look with eyes open wide;