to milk - affixation (adding the prefix "to" to the base word "milk") phone - abbreviation (shortening the word "telephone") unkind - prefixation (adding the prefix "un-" to the base word "kind") illegal - suffixation (adding the suffix "-al" to the base word "legal") activity - suffixation (adding the suffix "-ity" to the base word "active") grandfather - compounding (combining the words "grand" and "father")
to milk - affixation (adding the prefix "to" to the base word "milk")
phone - abbreviation (shortening the word "telephone")
unkind - prefixation (adding the prefix "un-" to the base word "kind")
illegal - suffixation (adding the suffix "-al" to the base word "legal")
activity - suffixation (adding the suffix "-ity" to the base word "active")
grandfather - compounding (combining the words "grand" and "father")