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нелишний adj. stresses
gen.	not useless (Alexander Demidov)
Gruzovik	not out of place; necessary
Makarov.	not superfluous; useful
math.	relevant
obs.	unsuperfluous
нелишне adj.
Gruzovik	it is not out of place; it does no harm

нелишний: 8 phrases in 3 subjects

Bookish / literary	1
Diplomacy	1
General	6