insidiosus

Latin

Etymology

From īnsidiae (“a lying in wait, an ambush, artifice, stratagem”) +‎ -ōsus, from īnsideō (“sit in or on”), from in (“in, on”) + sedeō (“sit”).

Pronunciation

• (Classical Latin) IPA^(key): /in.si.diˈoː.sus/, [ĩːs̠ɪd̪iˈoːs̠ʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /in.si.diˈo.sus/, [insid̪iˈɔːs̬us]

Adjective

īnsidiōsus (feminine īnsidiōsa, neuter īnsidiōsum, comparative īnsidiōsior, superlative īnsidiōsissimus); first/second-declension adjective

1. cunning, deceitful, insidious
2. dangerous, hazardous

Declension

First/second-declension adjective.

Number	Singular				Plural
Case / Gender	Masculine	Feminine	Neuter		Masculine	Feminine	Neuter
Nominative	īnsidiōsus	īnsidiōsa	īnsidiōsum		īnsidiōsī	īnsidiōsae	īnsidiōsa
Genitive	īnsidiōsī	īnsidiōsae	īnsidiōsī		īnsidiōsōrum	īnsidiōsārum	īnsidiōsōrum
Dative	īnsidiōsō		īnsidiōsō		īnsidiōsīs
Accusative	īnsidiōsum	īnsidiōsam	īnsidiōsum		īnsidiōsōs	īnsidiōsās	īnsidiōsa
Ablative	īnsidiōsō	īnsidiōsā	īnsidiōsō		īnsidiōsīs
Vocative	īnsidiōse	īnsidiōsa	īnsidiōsum		īnsidiōsī	īnsidiōsae	īnsidiōsa

Derived terms

• īnsidiōsē

Related terms

• īnsideō
• īnsidianter
• īnsidiātor
• īnsidiātrīx
• īnsidior

Descendants

• Catalan: insidiós
• English: insidious
• French: insidieux
• Italian: insidioso
• Portuguese: insidioso
• Romanian: insidios
• Spanish: insidioso

References

• “insidiosus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “insidiosus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• insidiosus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.