Letter O Flashcards
oaf
a dunce or blockhead
oasis
a place which offers a pleasant relief
obdurate
stubborn; hard-hearted
obeisance
a bow or similar gesture expressing deep respect
obese
very fat
obfuscate
to confuse; to bewilder; to perplex
oblation
an offering for religious or charitable purposes
obligatory
required; mandatory
oblique
slanted; indirect
obliterate
to erase; to do away with
oblivious
forgetful; unmindful
obloquy
strong disapproval; bad reputation resulting from public criticism
obnoxious
objectionable; offensive
obscurant
a person who tries to prevent the spread of knowledge
obscure
dim; not clear; not easily understood
obsequious
excessively submissive; overly attentive
obsequy
a funeral rite or ceremony
obsess
to control the thoughts or feelings of a person
obsolescent
going out of use; becoming extinct
obstinate
stubborn
obstreperous
boisterous; unruly
obtrude
to push something toward or upon a person
obtuse
slow to comprehend
obviate
to prevent
occidental
western; opposite of oriental
occlude
to close; to shut; to block out
occult
hidden; secret; mysterious
ocular
pertaining to sight
odious
disgusting; hateful
odoriferous
giving off a displeasing or strong smell
odyssey
a long journey
offal
garbage; waste parts
officious
meddling; interfering
ogle
to look at with desire
ogre
monster; hideous being
olfactory
pertaining to smell
oligarchy
government in which power is in the hands of only a few individuals
Olympian
majestic
omen
an event which indicates the future
ominous
threatening; indicating evil or harm
omnifarious
of all kinds
omnipotent
all-powerful
omniscient
all-knowing
omnivorous
eating any kind of food; absorbing everything
onerous
burdensome; heavy
onslaught
a furious attack
onus
a burden; a responsibility
opaque
not transparent; not letting light pass through
opiate
narcotic; causing sleep or relief
opportunist
one who takes advantage of a situation
oppress
to rule harshly; tyrannize
opprobrious
shameful; disgraceful
opt
( for) to choose
optimist
one who sees the good side of things
optimum
the best; most favorable
opulent
rich; luxurious
oracular
mysterious; predicting
oration
a speech delivered on a special occasion
orbit
a curved path, such as a planet takes around the sun
ordain
to order; to establish; to arrange
ordeal
difficult or painful experience; a primitive form of trial
ordinance
law; regulation
organic
fundamental; essential
Orient
(two meanings) an area of the Far East, such as Asia (noun); to adjust or adapt to (verb)
orifice
mouth; opening
ornate
showy; highly decorated
ornithology
study of birds
orthodox
accepting the usual or traditional beliefs
orthography
correct spelling
oscillate
to swing or move back and forth, like a pendulum
ossify
to change into bone; to become rigid
ostensible
apparent; conspicuous
ostentatious
showing off; boastful
ostracize
to banish; to exclude
oust
to drive out; to expel
outwit
to trick; to get the better of
overt
open; aboveboard; not hidden
ovine
of or like a sheep
ovoid
egg-shaped
