transcription, транскрипция: [ in-ˈsi-dē-əs ]
adjective
Etymology: Latin insidiosus, from insidiae ambush, from insidēre to sit in, sit on, from in- + sedēre to sit — more at sit
Date: 1545
1.
a. : awaiting a chance to entrap : treacherous
b. : harmful but enticing : seductive
insidious drugs
2.
a. : having a gradual and cumulative effect : subtle
the insidious pressures of modern life
b. of a disease : developing so gradually as to be well established before becoming apparent
• in·sid·i·ous·ly adverb
• in·sid·i·ous·ness noun