Answer:

either

AnswerCrossword Clue
EITHERChoice word
EITHERWhichever
EITHERThis or that
EITHERNoncommittal reply
EITHERFlexible reply
EITHEROne or the other
EITHERA choice word
EITHERFlexible person's choice
EITHERFlexible response
EITHERFlexible reply to an offer
EITHERUltimatum word
EITHEROne of two