endulzar - to sweeten

endurecer - to harden

enfatizar - to emphasize

enflaquecer - to make thin, to weaken, to get thin

engreir - to spoil, to spoil oneself, to show off

engrosar - to thicken

engullir - to devour

enhebrar - to thread

enloquecer - to drive crazy

enmohecer - to rust

ennoblecer - to ennoble

enrarecer - to rarefy

enredar - to entangle, to involve, to confuse