recurve
verb
[ rɪˈkəːv ]
• bend backwards.
• "the petals recurve, elevating the flower"
recurve
noun
• a bow that curves forward at the ends, which straighten out under tension when the bow is drawn.
Origin:
late 16th century: from Latin recurvare ‘bend something back’, from re- ‘back’ + curvare ‘to bend’.