epiglottis

n (anatomy 解) thin flap of tissue at the back of the tongue that covers the windpipe during swallowing to prevent food or drink from entering the lungs 会厌.

envisage, envision, envoy, envy, enzyme, eon, EP, epaulet, epaulette (also esp US epaulet), epee, ephemera, ephemeral, epic, epicentre (US epicenter), epicure, epicurean, epidemic, epidermis, epidural, epiglottal, epigram, epigrammatic, epilepsy, epileptic, epilogue, Epiphany, episcopal, episcopalian, episiotomy, episode, episodic, epistemology, epistle, epistolary, epitaph, epithet, epitome, epitomize, epitomize, epitomise, EPNS,