develop or come to a promising stage; "Youth blossomed into maturity"発達するか、伸び盛りの段階にくる開花
spread out or open from a closed or folded state; "open the map"; "spread your arms"閉じたか包まれた状態から散開するか開く拡げる
extend or stretch out to a greater or the full length; "Unfold the newspaper"; "stretch out that piece of cloth"; "extend the TV antenna"より大きくまたは等身大に広げる、あるいは伸ばす開展