black gum(或sour gum)美国紫树(Nyssa sylvatica)

落叶观赏树木。原产北美东部。坚硬的木材可制作车轴。

• outface
• outfacing
• outfight
• outfit
• outflank
• outflow
• outflux
• outfly
• outfocus
• outfox
• out-frown
• outgiving
• outgo
• outgoing
• outguard
• outguess
• outgun
• outhaul
• outhouse
• outing
• outjest
• outland
• outlaw
• outlawed
• outlawry