Similar words: teff, effort, effuse, effect, effete, efflux, effigy, efface. Meaning: [ef] 
v. have sexual intercourse with.
v. have sexual intercourse with. (31) The extension, which can be downloaded at eff.org/https-everywhere, makes "https" the stubbornly unchangeable default on all sites that support it.
More similar words: teff, effort, effuse, effect, effete, efflux, effigy, efface, effects, effluvia, effected, efferent, in effect, effortful, effusion, effector, effluent, efficacy, effusive, effortless, effluvium, effective, effluence, effulgent, efficient, effectual, effciency, ineffable, ineffably, take effect.