Insidious

"Insidious" in Russian

кова́рный

kovárnyj

(causing harm in a stealthy, often gradual, manner)

кова́рный

kovárnyj

(intending to entrap)

скры́тый

skrýtyj

(causing harm in a stealthy, often gradual, manner)

хи́трый

xítryj

(causing harm in a stealthy, often gradual, manner)

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.