Answer: warmed

AnswerCrossword Clue
WARMED... up to (became genial)
warmedto make or become warm
warmedfriendly; affectionate
warmedheated or angry
warmedWARM, to raise the temperature
warmedhaving, giving, or feeling moderate heat
WARMEDBecame enthusiastic
WARMEDMicrowaved briefly
WARMEDGot friendlier
WARMEDLoosened (up)
WARMEDLimbered (up)
WARMEDThawed
WARMEDBecame friendly, with "to"
WARMEDBasked
WARMEDBecame friendly
WARMEDGrew more interested
WARMEDGrew friendly.
WARMEDBecame animated (with "up").
WARMEDHeated up
WARMEDPrepared leftovers