in|sid´i|ous|ly

in|sid´i|ous|ly
in|sid|i|ous «ihn SIHD ee uhs», adjective.
1. seeking to entrap or ensnare; wily or sly; crafty; tricky; treacherous: »

an insidious foe.

SYNONYM(S): cunning, underhand.
2. working secretly or subtly; developing without attracting attention; more dangerous than is apparent: »

He died of an insidious disease before the doctors realized he was sick.

╂[< Latin īnsidiōsus < īnsidiae, plural, ambush < īnsidēre sit in < in- in + sedēre sit]
–in|sid´i|ous|ly, adverb.
–in|sid´i|ous|ness, noun.

Useful english dictionary. 2012.

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Look at other dictionaries:

  • as|sid´u|ous|ly — as|sid|u|ous «uh SIHJ u uhs», adjective. working hard and steadily; careful and attentive; diligent: »No error escaped his assiduous attention to detail. SYNONYM(S): steady, unremitting, untiring. ╂[< Latin assiduus (with English ous) <… …   Useful english dictionary

  • as|sid|u|ous — «uh SIHJ u uhs», adjective. working hard and steadily; careful and attentive; diligent: »No error escaped his assiduous attention to detail. SYNONYM(S): steady, unremitting, untiring. ╂[< Latin assiduus (with English ous) < assidēre sit at… …   Useful english dictionary

  • in|sid|i|ous — «ihn SIHD ee uhs», adjective. 1. seeking to entrap or ensnare; wily or sly; crafty; tricky; treacherous: »an insidious foe. SYNONYM(S): cunning, underhand. 2. working secretly or subtly; developing without attracting attention; more dangerous… …   Useful english dictionary

  • cas|sid|e|ous — «kuh SIHD ee uhs», adjective. Botany. helmetshaped; helmetlike. ╂[< Latin cassis, cassidis helmet + English ous] …   Useful english dictionary

  • as|sid´u|ous|ness — as|sid|u|ous «uh SIHJ u uhs», adjective. working hard and steadily; careful and attentive; diligent: »No error escaped his assiduous attention to detail. SYNONYM(S): steady, unremitting, untiring. ╂[< Latin assiduus (with English ous) <… …   Useful english dictionary

  • in|sid´i|ous|ness — in|sid|i|ous «ihn SIHD ee uhs», adjective. 1. seeking to entrap or ensnare; wily or sly; crafty; tricky; treacherous: »an insidious foe. SYNONYM(S): cunning, underhand. 2. working secretly or subtly; developing without attracting attention; more… …   Useful english dictionary

  • as·sid·u·ous — …   Useful english dictionary

  • in·sid·i·ous — …   Useful english dictionary

  • sid — aero·sid·er·ite; aero·sid·er·o·lite; an·ap·sid; aph·ro·sid·er·ite; ap·sid·i·ole; ar·ga·sid; ar·se·ni·o·sid·er·ite; as·sid·u·ous; as·sid·u·ous·ly; as·sid·u·ous·ness; bal·a·no·glos·sid; ba·sid·i·al; ba·sid·io·carp; ba·sid·io·lichen;… …   English syllables

  • ous — ovig·er·ous; ovu·lif·er·ous; ozon·if·er·ous; ozon·ous; pa·lav·er·ous; pal·la·dif·er·ous; pal·la·di·ous; pap·il·lif·er·ous; pap·u·lif·er·ous; par·ous; par·ri·cid·i·ous; pec·tin·ous; pe·dig·er·ous; pel·tig·er·ous; pen·tam·er·ous; pe·nu·ri·ous;… …   English syllables

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