undermining
un-der-min-ing
noun
The act of gradually weakening or damaging something, often subtly or insidiously.
"His constant criticism led to the undermining of her confidence."
verb
The action of gradually weakening or damaging something or someone, often in a subtle way.
"His actions were undermining the team's morale."
Thesaurus
Synonyms: sabotage, counteract, countermine, subvert, undermine, weaken, cave