A speaker must possess a clear diction i.e., he must have a defined pronunciation and enunciation. One can achieve this by opening the mouth properly and using the human speech mechanism effectively to his own benefit. Proper breathing is also necessary in achieving good diction.
Words often mispronounced and wrongly accented:
among
away
awry
apparatus
apple
apartheid
appendices
aviary
Arkansas
abatoir
acumen
adamant (noun)
admirable
affect (noun)
affect (verb)
aggravate
agile
agitate
alimony
allegiance
alms
amiable
anecdote
annihilate
balloon
baccalaureate
brassiere
ballet
belligerent
biceps
bilingual
boudoir
buffe
bourgeois
beret
benign
bivouac
biennial
begot
beneficiary
benefited
buillion
brewery
bologna
biscuit
beige
bouyant
bureau
bolsterous
cashew
cache
chalet
chateau
charmois
charade
champagne
churhc
chaos
circuitous
circuit
ceremony
cruise
chignon
camisale
committee
choir
chassis
chauvinism
cologne
cadaver
canister
carcature
catastrophe
catechism
celibacy
croquette
crochet
cypress
Chicago
demitasse
demure
debt
die hard
duet
decalogue
delicatessen
discreet
dibres
dualogue
diem
demogogue
debut
danseuse
echelon
eschew
esquire
esteem
entrepreneur
entente
entourage
ennui
enmass
encore
erudite
ensemble
ebony
eccentric
eclipse
effrontery
elicit
enamel
facade
fascimili
fictitious
forehead
formula
feign
femme fatal
fatality
futile
graham
genuflect
genre
gourmet
gourmand
guerilla
ghetto
gymnasium
gibe
gear
genuine
guarantee
heinuous
heirarchy
humiliation
homage
hermitage
hypocrite
Illinois
itinerary
isthmus
idolatry
illigitimate
incomparable
inevitable
infamous
irrelevant
jettison
juvenile
jeopardy
jaundice
jujitsu
kennel
knowledgeable
known
kiln
kiosk
knead
kola
lieu
lieutenant
limerick
linage
luminary
leakage
lunatic
literature
limousine
log
lagoon
lampoon
lanolin
lapel
laryngitis
lasagna
laser
lathe
latter
launch
legged
leisure
lettuce
lounge
loge
lodge
lyre
langerie
mackerel
madame
mademoiselle
magazine
malaise
maligh
manger
maniac
mannequin
manoeuvre
manuscript
maple
martyr
masquerade
massacre
meringue
metaphor
miniature
miscellaneous
missle
macaroon
napthalene
nausea
necessary
negligible
neophyte
nymph
New Hampshire
oasis
obese
ocular
ogre
opaque
orchestra
osmosis
paean
palette
palm
parachute
pardonable
paw
perseverance
phlegm
phoenix
prestige
presumtuous
poignant
pomade
Phthisis
queque
quesy
query
quench
qouth
quire
qualm
quasi
quay
rabi
realm
receipt
recess
refugee
residue
reprieve
rise
rebuke
regime
remedy
restaurant
rout
rummage
staunch
superflous
sardines
silhouette
semester
siphon
sentimental
sublimate
sovereighty
slouch
slosh
smudge
soggy
trigonometry
threat
Thomas
thorough
thine
tourniquet
thesis
tamborine
turbine
turquoise
turpentine
triple
trisect
twine
tyranny
tyrant
typoid
utensil
usurp
union
umbra
utilitarianism
uttermost
uvula
usury
utmost
usurer
usual
viscount
viceroy
vignette
villainous
vizor
vulnerable
voyage
vulture
vowel
vying
viable
vicious
vale
vague
vogue
vault
velium
virtuocity
wagon
war
weave
whole
wieki
wreath
wreckage
wring
wretch
writ
writhe
xylem
zerox
xenon
yawn
yacht
yeoman
yore
yew
yeast
zenith
zygote
zoology
