evert
verb
[ ɪˈvəːt ]
• turn (a structure or organ) outwards or inside out.
• "the brown hyena deposits chemicals by everting an anal pouch"
Origin:
mid 16th century (in the sense ‘upset, overthrow’): from Latin evertere, from e- (variant of ex- ) ‘out’ + vertere ‘to turn’. The current sense dates from the late 18th century.
