Origin: 1605–15; < L
intercalātus ptp. of
intercalāre to insert a day or month into the calendar, equiv. to
inter- inter- +
calā- (s. of
calāre to proclaim) +
-tus ptp. suffix

Related forms: in⋅ter⋅ca⋅la⋅tive, adjective
Synonyms:
1. interject, introduce, insinuate.