To instill.
To insert a morpheme inside an existing word.
A morpheme that always appears between other morphemes in a word, such as -i- and -o- in English (i.e. an interfix).
A morpheme inserted inside an existing word, such as -bloody- in English.
Used other than figuratively or idiomatically: see work, in.
To find time or space for, amid other things.
To work out using a machine in between the sets of someone who is already using that machine.