Crossword Clue:

INSUPERABLE that cannot be overcome

AnswerCrossword Clue
INDELIBLEThat cannot be forgotten
TRESSLock that cannot be opened
DRAFTCall to arms (that cannot be denied).
SSTCraft that must overcome wave drag, in brief
AYDSWeight-loss candy of the '70s and '80s that couldn't overcome its unfortunate homophone
EMUBird that cannot fly
EMUSSome birds that cannot fly
EMUSCertain birds that cannot fly
EMUSBig birds that cannot fly
MIMEEntertainer that the blind cannot enjoy
TIS"... .. an ill cook that cannot lick his own fingers": "Romeo and Juliet"
CORDELIAShakespeare character who says "Unhappy that I am, I cannot heave - My heart into my mouth"