What does sleeplessly mean?
Sleeplessly means without sleeping or being able to rest. The adverb is especially appropriate for describing a person who remains awake through the night because of worry, excitement, discomfort, or obligation: a parent lay sleeplessly beside a feverish child, while another writer worked sleeplessly to meet a deadline. It can suggest more than simple wakefulness, often carrying the implication of restlessness or emotional strain. In ordinary descriptions, sleeplessly is usually followed by an action such as waiting, lying, worrying, or working. Its related adjective, sleepless, describes a night, period, or person characterized by lack of sleep. Together with sleeplessness, it belongs to a familiar English word family based on sleep and the suffix -less, meaning “without.”
adverbIn a sleepless manner, without sleeping or being able to rest. It can describe a period of wakefulness or the way a person continues working, travelling, or worrying without sleeping.
- Without sleeping; in a state of continued wakefulness.
- In a manner marked by restlessness, anxiety, or inability to rest.
"She spent the night sleeplessly, listening to the storm and waiting for dawn."
"He worked sleeplessly through the night, trying to finish the report before the deadline."
"The child lay sleeplessly, listening for footsteps in the hallway."
The word turns a simple state into an action: to be sleeplessly is to endure wakefulness while the world around you sleeps.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does sleeplessly come from?
Sleeplessly is formed from the adjective sleepless by adding the adverbial suffix -ly. The adjective sleepless combines sleep with the suffix -less, meaning “without,” and its use in English is recorded from the early modern period. The underlying verb sleep comes from Old English slǣpan, with the related noun slǣp. Words such as sleeplessness and sleepless belong to the same productive English family, while the modern English sense of sleeplessness also developed through a tradition of describing chronic inability to sleep.
Related word forms
How sleeplessly is actually used
Sleeplessly is formal to neutral in register. It is commonly used for prolonged or difficult wakefulness, but it can also imply anxious or troubled thoughts.
Easily confused with sleeplessly
Sleeplessly describes being unable to sleep or continuing without sleep, whereas sleepily describes feeling drowsy or tending to fall asleep.