fuse (JOIN): verb [I or T] to join or become combined
Genes determine how we develop from the moment the sperm fuses with the egg.
The bones of the skull are not properly fused at birth.
In Istanbul, East and West fuse together in a way that is fascinating to observe.
fusion: noun
when two or more things join or are combined:
nuclear fusion
Their music is described as 'an explosive fusion of Latin American and modern jazz rhythms'.
核聚變；熱核反應