Answer:
Buried verbs are words that are unnecessarily and needlessly converted to wordy noun expressions. When such nouns are converted, they often end with –tion, -ment, and –ance.
Such nouns that are converted this way are known as Zombie nouns.
Examples:
Buried verbs: require, maintain, sustain, etc.
Zombie nouns: requirement, maintenance, sustenance, etc.
Buried verbs: to be consider as, to be seen as, make a discussion, etc.
Unburied verbs: consider, seen, discuss, etc.
Writers are to avoid buried verbs because they make writing sound formal and difficult to read, understand and assimilate. When buried verbs are avoided by writers, their writings become easier to read and understand.
Also, zombie nouns increase the length of sentences and make the reader slow in reading.