1. fast asleep

adjective. Sleeping deeply; he's sound asleep".
Synonyms
sound asleep asleep
Antonyms
awake conscious aware
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2. fast-growing

adjective. Tending to spread quickly.
Synonyms
strong-growing aggressive invasive
Antonyms
confined unassertive unaggressive defensive

3. fast-flying

adjective. Moving swiftly.
Synonyms
moving flying
Antonyms
nonmoving immobile motionlessness

4. asleep

adjective. (əˈsliːp) In a state of sleep.
Synonyms
torpid unaware sound asleep hibernating slumberous hypnoid sleepyheaded at rest dormant slumbery sleepy-eyed sleepy slumbrous fast asleep dozy unconscious drowsing unawakened somnolent incognizant drowsy
Antonyms
conscious awake aware erect voluntary
Etymology
asleep (English)
a- (English)
a- (Anglo-Norman)
e- (Old French (842-ca. 1400))
ex- (Latin)
a- (Middle English (1100-1500))
a- (Old English (ca. 450-1100))
ab (Latin)
ἀ- (Ancient Greek (to 1453))
sleep (English)
sleep (Middle English (1100-1500))
slæp (Old English (ca. 450-1100))
slepen (Middle English (1100-1500))
slæpan (Old English (ca. 450-1100))

5. asleep

adjective. (əˈsliːp) Dead.
Synonyms
departed deceased gone dead at peace at rest
Antonyms
alive active witting incognizance restless
Etymology
asleep (English)
a- (English)
a- (Anglo-Norman)
e- (Old French (842-ca. 1400))
ex- (Latin)
a- (Middle English (1100-1500))
a- (Old English (ca. 450-1100))
ab (Latin)
ἀ- (Ancient Greek (to 1453))
sleep (English)
sleep (Middle English (1100-1500))
slæp (Old English (ca. 450-1100))
slepen (Middle English (1100-1500))
slæpan (Old English (ca. 450-1100))

6. asleep

adjective. (əˈsliːp) Lacking sensation.
Synonyms
insensible numb benumbed
Antonyms
sensible attentive living present
Etymology
asleep (English)
a- (English)
a- (Anglo-Norman)
e- (Old French (842-ca. 1400))
ex- (Latin)
a- (Middle English (1100-1500))
a- (Old English (ca. 450-1100))
ab (Latin)
ἀ- (Ancient Greek (to 1453))
sleep (English)
sleep (Middle English (1100-1500))
slæp (Old English (ca. 450-1100))
slepen (Middle English (1100-1500))
slæpan (Old English (ca. 450-1100))

7. fast

adjective. (ˈfæst) Acting or moving or capable of acting or moving quickly.
Synonyms
double-quick speedy express hurrying fastness smart quick red-hot high-velocity winged hot meteoric hurried straightaway alacritous speed scurrying rapid fleet accelerated immediate blistering high-speed fast-paced prompt instant sudden instantaneous windy swift swiftness fast-breaking
Antonyms
gradual slow unhurried looseness movableness
Etymology
fast (English)
fæst (Old English (ca. 450-1100))
fæstan (Old English (ca. 450-1100))

8. fast

noun. (ˈfæst) Abstaining from food.
Synonyms
dieting hunger strike diet Ramadan abstinence fasting
Antonyms
legal nonradioactive uneager stale bad
Etymology
fast (English)
fæst (Old English (ca. 450-1100))
fæstan (Old English (ca. 450-1100))

9. fast

adverb. (ˈfæst) Firmly or closely.
Synonyms
tight
Antonyms
uncharged tasteless
Etymology
fast (English)
fæst (Old English (ca. 450-1100))
fæstan (Old English (ca. 450-1100))

10. fast

adjective. (ˈfæst) (of surfaces) conducive to rapid speeds.
Synonyms
smooth
Antonyms
rough nonviolent
Etymology
fast (English)
fæst (Old English (ca. 450-1100))
fæstan (Old English (ca. 450-1100))
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