tính từ
thức, không ngủ
a sleepless night: một đêm không ngủ
chứng mất ngủ
/ˈsliːpləs//ˈsliːpləs/"Sleepless" is a combination of two Old English words: "slæp," meaning "sleep," and "lēas," meaning "without" or "lacking." The word first appeared in Old English literature around the 10th century, though it likely existed in spoken language earlier. Its formation follows the standard pattern of adding the "lēas" suffix to create negative adjectives, as seen in words like "worthless" and "childless." The meaning of "sleepless" has remained consistent over time, describing a state of being without sleep, often due to worry, excitement, or a medical condition.
without sleep
không ngủ
Gần đây tôi đã có vài đêm mất ngủ.
not able to sleep
không thể ngủ được
Cô nằm mất ngủ cho tới tận bình minh.