Definition

Describing something that prevents or counteracts sleep.

Example

The new medication has an antisleep effect, keeping users awake for longer periods.

Conversation

I heard that some drinks can have an antisleep effect, helping you stay awake.

Really? I could use something like that during late-night study sessions.

Yeah, I think they contain caffeine or other ingredients that counter sleepiness.

I should definitely try one before my next exam!

Synonyms & Antonyms

Root Explanation

Antisleep is formed from "anti-" (meaning against) and "sleep" (from Old English "slæpan", meaning to rest or be in a state of sleep). The word describes a state or action that is against or counter to sleep.

Memory Tip

Think of 'anti-' meaning against, and 'sleep' referring to the state of rest. This helps you remember that antisleep means being against sleep.

Visually Confused Words