mating
Word family
Synonym discussion
Sense: verb/1
'Breed' is the broadest of the group — it covers the entire cycle from mating through raising young, and is also used for the human activity of keeping animals for reproduction ('He breeds Labrador retrievers'). 'Copulate' is the most clinical term, used almost exclusively in formal scientific writing about the physical sex act itself; you would not use it in a children's book about farm animals. 'Pair' shifts focus from the sex act to the formation of a bonded couple — many birds pair for a season or for life, but 'pairing' may or may not lead to mating. 'Reproduce' covers the biological outcome (producing offspring) regardless of the mechanism. Example: 'These penguins pair in October, mate in November, and successfully reproduce every year.'
Common collocations
Etymology
The word 'mating' comes from the verb 'mate', which entered English around the 1300s from Middle Low German 'mate' meaning 'companion, table-sharer'. The sense of 'joining in marriage' appeared in the 1400s, and by the 1500s the term had extended to the pairing of animals for reproduction. The '-ing' suffix turns the verb into a noun or present participle, giving 'mating' its modern sense of 'the act of animals coming together to produce young'.