interfere

Etymology

Old French entreferir, from entre- + ferir (“to hit, to strike”), itself from the Latin verb ferio.

verb

1. (intransitive) To get involved or involve oneself, causing disturbance.
   I always try not to interfere with other people’s personal affairs.
2. (intransitive, physics) (of waves) To be correlated with each other when overlapped or superposed.
   Correlated waves interfere to produce interesting patterns, while uncorrelated waves overlap without interfering.
   Where the radio-wave signals of the two radio stations interfere the listener hears nothing but noise.
3. (mostly of horses) To strike one foot against the opposite foot or ankle in using the legs.
4. (intransitive, followed by "with") To sexually molest, especially of a child.
   The investigation found the girls had been interfered with.