/
ɪˈklɪps/
n.
  - an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination. ▸an instance of being eclipsed by another person or thing. 
- Ornithology  a phase during which the distinctive markings of a bird (especially a male duck) are obscured by moulting of the breeding plumage.
v.
  - (of a celestial body) obscure the light from or to (another body).
- deprive of significance, power, or prominence.
Etymology
ME: from OFr. e(s)clipse (n.), eclipser (v.), via L. from Gk ekleipsis, from ekleipein ‘fail to appear, be eclipsed’.