Definition: Something that cannot be satisfied or quenched, often referring to a strong desire or thirst.

Example: His unslakable thirst for knowledge drove him to read every book he could find.

Definition: Not showing a smile; having a serious or stern expression.

Example: Despite the happy occasion, she remained unsmiling throughout the event.

Definition: The condition of being unfriendly or not wanting to socialize with others.

Example: His unsociability made it difficult for him to make friends at school.

Definition: The condition of being unfriendly or not wanting to socialize with others.

Example: His unsociableness made it difficult for him to make friends at school.

Definition: In a way that is not friendly or social; avoiding interaction with others.

Example: He behaved unsociably at the party, choosing to sit alone instead of mingling with the guests.

Definition: Not fortunate or lucky; lacking in good fortune.

Example: Despite his efforts, he felt quite unsonsy in his endeavors this year.

Definition: Not having a lot of experience or knowledge about the world; simple and straightforward.

Example: Her unsophisticated approach to the problem surprised everyone.

Definition: Something that is not looked for or requested; it happens without being asked for.

Example: She received some unsought advice from her friends.

Definition: Not explored or understood; lacking depth or clarity.

Example: The mysteries of the universe remain largely unsounded by scientists.

Definition: This word describes someone or something that is harsh, severe, or not showing mercy. It can also mean being very generous or not holding back.

Example: The teacher gave unsparing feedback on the students' essays to help them improve.