to put, fit, place, (something) (in, into, between etc)

put, tuck in

to stop and (usually) get hold of (a person or thing) between the starting-point and destination

head off; interrupt

to break in on another person's affairs without right or invitation

meddle, intervene

(to cause oneself, something) to enter when not invited or wanted

trespass, interrupt

to become involved without being asked to do so; interfere

intervene, interfere

to interfere with something

interfere, alter