Definition

A person or thing that watches over or protects a place, often serving as a guard or lookout.

Example

The sentinel stood at the entrance, ensuring that no one entered without permission.

Conversation

Did you hear about the old castle?

Yeah! I heard they have a sentinel guarding the entrance.

That sounds really cool, like something out of a movie!

For sure! I’d love to see it in person.

Synonyms & Antonyms

Definition

To place someone or something in a position to watch over or protect an area.

Example

The soldiers were sent to sentinel the border against any intruders.

Tense Forms

Conversation

Did you hear about the new security measures at the park?

Yeah, they decided to sentinel the area more closely.

I think that's a good idea for keeping everyone safe.

Root Explanation

**Sentinel** → It is formed from "senti" (from Latin *sentire*, meaning to feel or perceive) and "-nel" (a diminutive suffix). The word "sentinel" refers to a person who perceives or watches over a place, acting as a guard or lookout.

Memory Tip

Think of someone who 'feels' or 'perceives' their surroundings — that's what a sentinel does, keeping watch.

Visually Confused Words