Answer:

unkink

Answer	Crossword Clue
UNKINK	Straighten, as a phone cord
UNKINK	Straighten out, in a way
UNKINK	Get the knots out of

UNKINK	Straighten, as a twisted hose

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.