This character is a Other Letter and is mainly used in the Han script. The Unihan Database defines it as (same as 眨) to wink; (same as 睫) eyelashes, having one eye smaller than the other, joke; witticism; pleasantry; jest; fun; (Cant.) to peep at; to blink, wink. Its Pīnyīn pronunciation is jié.
The glyph is not a composition. It has a Wide East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. The glyph can, under circumstances, be confused with 3 other glyphs. In text U+4039 behaves as Ideographic regarding line breaks. It has type Other Letter for sentence and Other for word breaks. The Grapheme Cluster Break is Any.
(same as 眨) to wink; (same as 睫) eyelashes, having one eye smaller than the other, joke; witticism; pleasantry; jest; fun; (Cant.) to peep at; to blink, wink