adjective

1. made dim by tears, mucus, etc.: said of eyes
2. blurred; dim; indistinct; misty

Etymology: ME blere, watery, rheumy < the v.

transitive verb

1. to dim (the eyes) with tears, mucus, etc.
2. to blur (a surface or an outline)

Etymology: ME bleren, to have watery eyes, akin to Ger plärren, to bawl, cry < IE base *bhlē-, to howl, weep (of echoic orig.) > blare, bleat, L flere, to weep