| Term | Definition |
| Interloper | someone who intrudes on the privacy or property of another without permission |
| Internecine | characterized by bloodshed and carnage for both sides |
| Interpolate | insert words into texts, often falsifying it thereby |
| Interregnum | the time between two reigns, governments, etc. |
| Interpose | to insert between other elements |
| Juxtapose | place side by side |
| Propinquity | nearness |
| Rapprochement | the reestablishing of cordial relations |
| Quiescent | not active or activated |
| Acquiesce | to accept without protest; to agree or submit |
| Requiem | a Mass celebrated for the dead |
| Unrequited | not requited; not reciprocated; Ex. unrequited love |
| Abstruse | difficult to understand |
| Extrude | form or shape by forcing through an opening |
| Obtrude | thrust oneself in as if by force |