Meaning:
Something which is not relevant or has no meaning
Example:
Henry was talking nonsense in class today, so nobody could understand what he was saying.

3.Thoughtless

Meaning:
To do something stupid or unkind because you did not think about it
Example:
John was very thoughtless; not only did he forget Sally’s birthday, he also insulted her.

4. Effective

Meaning:
When something works well
Example:
When Mark promised to give the students candy they all started working hard.
The candy was a very effective way of motivating them.

5. Breakable

Meaning:
Something that can be broken easily
Example:
“Be careful not to drop those plates, they’re breakable.”