1) Break up 2) Butt in 3) Come in 4) Cut off 5) Disrupt 6) Inject 7) Insert 8) Interpose 9) Interrupt 10) Introduce 11) Punctuate 12) Put in 13) Step in 14) Stick in 15) To come between 16) To interpose oneself 17) To intervene 18) Use parentheses 1) Interrupt 
• (v. t.) To throw in between; to insert; to interpose. • (v. i.) To throw one`s self between or among; to come between; to interpose.
In`ter·ject' transitive verb [ imperfect & past participle Interjected ; present participle & verbal noun Interjecting .] [ Latin interjectus , past participle of interjicere to interject; inter between + jac......
[v] - to insert between other elements
come in verb to insert between other elements; `She interjected clever remarks`
to insert between other things: to interject a clarification of a previous statement. · to come between.
[SAT terms] insert between other elements to insert between other elements to insert between other elements