somnolence

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a very sleepy state
- sleepiness causes many driving accidents
• Syn:
sleepiness, drowsiness
• Ant:
wakefulness (for: sleepiness)
• Derivationally related forms:
somnolent, drowsy (for: drowsiness), sleepy (for: sleepiness)
• Hypernyms:
temporary state
• Hyponyms:
oscitancy, oscitance

• Từ đồng nghĩa / Synonyms:
  sleepiness, drowsiness
• Từ trái nghĩa / Antonyms:
  wakefulness, sleeplessness