What is an adjective of repel?

There isn't a single perfect adjective for "repel." However, depending on the context, you could use various options:

For physical repulsion:

* Repellent: This is the most direct and common adjective.

* Repulsive: This implies something that is disgusting or sickening.

* Offensive: This suggests something that is unpleasant or disagreeable.

For metaphorical repulsion:

* Deterrent: This refers to something that discourages or prevents something.

* Discouraging: This emphasizes the negative impact on motivation.

* Unattractive: This suggests something that lacks appeal.

* Uninviting: This highlights the lack of welcoming qualities.

Examples:

* Repellent: "The bug spray had a strong, repellent smell."

* Repulsive: "The sight of the rotting food was repulsive."

* Deterrent: "The high security measures were a deterrent to crime."

* Unattractive: "The idea of public speaking was unattractive to her."

The best adjective depends on the specific meaning you want to convey.