Meaning

verb develop or come to a promising stage

verb open to the view

verb extend or stretch out to a greater or the full length

originEtymology tree Proto-Indo-European *h₂ent- Proto-Indo-European *-s Proto-Indo-European *h₂éntsder. Proto-Germanic *anda- Proto-West Germanic *anda- Old English and- Old English on- Middle English on- English un- English fold English unfold From un- + fold (“to confine into a fold or pen”).

Etymology from Wiktionary, CC BY-SA 3.0