Elide versus omit [closed]
Omit can be and is used in many contexts where elide would be at best an odd choice. Notable among these is where what is being negated is an action, which one omits (fails) to perform. Elide applies more narrowly to the use of language, as when a syllable or vowel is elided in pronunciation, or some potential subject matter is passed over in silence. OED s.v. elide, only defs. not marked as obsolete:
To strike out, suppress, pass over in silence. [though examples given clearly instantiate only this last]
Grammar. To omit (a vowel, or syllable) in pronunciation.