Crossword Clue:

to combine

AnswerCrossword Clue
MERGECause to combine.
OENO"Wine," to combine
UNITIVETending 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