verb

join or blend to form a single entity.

intermarriage had fused the families into a large unit

combine,amalgamate,put together,blend,merge,meld,mingle,intermix,intermingle,synthesize,coalesce,compound,alloy,agglutinate,unite,marry,admix,commingle,commix,interflow

noun

a safety device consisting of a strip of wire that melts and breaks an electric circuit if the current exceeds a safe level.

circuit breaker,trip switch,residual current device