嵌

to fit (e.g. a pane into a frame)

to fit

inlay

inlaid woodwork

setting in

fitting together (e.g. nuts and bolts)

wait for the middle tile of a three-in-a-row which will finish one's hand

wait for the middle tile of a chow

insertion

to put in a (plaster) cast

incarceration (e.g. of a hernia)

to hoop