Definition

In a way that shows a lack of consideration or care; without thinking about the consequences.

Example

She spoke thoughtlessly, not realizing how her words would affect him.

Conversation

I can't believe I forgot your birthday again!

It's okay, it happens — you just did it thoughtlessly.

I really need to set reminders to avoid being so careless.

Yeah, that would help a lot; we all forget things sometimes.

Synonyms & Antonyms

Root Explanation

Thoughtlessly → It is formed from "thought" (from Old English *þoht*, meaning the process of thinking) and "-less" (meaning without). The word "thoughtlessly" means without thought or consideration.

Memory Tip

Think of being 'without' ('-less') any 'thinking' ('thought') — that's why thoughtlessly means acting without thinking.

Visually Confused Words