low-level vs under

low-level and under both are adjectives.

Word	Noun	Adjective	Verb	Adverb
low-level	No	Yes	No	No
under	No	Yes	No	Yes

low-level (adjective)	under (adjective)
lower in rank or importance	located below or beneath something else
at a low level in rank or importance	lower in rank, power, or authority
occurring at a relatively low altitude
not intense

low-level (adverb)	under (adverb)
	further down
	down below
	below the horizon
	below some quantity or limit
	in or into a state of subordination or subjugation
	down to defeat, death, or ruin
	into unconsciousness
	through a range downward