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самонадеянно adv. stresses
gen.	self-confidently; self confidently; consequential; securely; arrogantly; presumptuously (MichaelBurov)
Gruzovik	self-sufficiently; conceitedly
law	presumptiously
obs.	presumingly; pretendingly
самонадеянный adj.
gen.	bumptious; cocksy; assuming; arrogant; overweening; overconfident; assumptive; confident; reliant; overproud; self-assertive; self-assured; self-opinionated; self-sufficing; self-sufficient; upstart; too big for one's boots; self asserting; self assured; self opinionated; self sufficient; self sufficing; bold; presumptuous (It was a bit presumptuous of her to take the car without asking. cambridge.org Vadim Rouminsky); presuming; buckish; confidant; consequential; presumptive; pretentious; secure
Gruzovik	conceited; self-opinioned
Игорь Миг	assertive
amer.	fresh; vain (you're so vain and it bothers me Val_Ships)
inf., disappr.	cocksure (She was cocksure that she was able to do the job better than anyone else. Val_Ships)
law	wanton; reckless (в некоторых случаях // см. преступная самонадеянность 4uzhoj)
Makarov.	self-asserting
slang	horse's ass; nervy; high-hatty; horse's collar; horse's neck; horse's tall; smart aleck; smart ass; smart guy; uppity

самонадеянно: 46 phrases in 9 subjects

General	31
Greek and Roman mythology	1
Idiomatic	1
Informal	2
Literature	1
Makarov	3
Obsolete / dated	1
Psychology	1
Slang	5