Crossword Clue:

to combine again

AnswerCrossword Clue
OENO"Wine," to combine
UNITIVETending to combine.
MERGECause to combine.
INERTHard to combine
INERTHard to combine, chemically
XENONHard-to-combine gas
SMOKEWord that can combine with the starts of the answers to the six starred clues
FIREWord that can combine with the ends of the answers to the six starred clues