| Word | Definitions | Synonyms |
|---|---|---|
| erode | (verb) remove soil or rock | Synonyms: eat away, fret |
| (verb) become ground down or deteriorate | Synonyms: eat at, gnaw, gnaw at, wear away | |
| heterodyne | (verb) combine (a radio frequency wave) with a locally generated wave of a different frequency so as to produce a new frequency equal to the sum or the difference between the two | - |