impertinence (noun) impertinence: boldness
Sinonime: annihilative,
baleful, baneful,
calamitous, cataclysmic,
catastrophic, crippling,
damaging,
deadly,
deleterious, depleting,
dire, draining, exhausting,
extravagant,
fatal, fateful,
harmful,
hurtful, immoderate, impoverishing, injurious, murderous,
noxious,
pernicious, shattering, suicidal,
unfortunate,
wasteful, withering, wrackful
Antonime: advantageous,
assisting,
beneficial,
helpful