What is the plural form of "thief"?

The plural form of “thief” is “thieves.”

Rule Explanation:

• Some nouns ending in -f or -fe change to -ves in their plural form.
• “Thief” follows this rule:
  thief → thieves

Examples of Similar Words:

• leaf → leaves
• wolf → wolves
• life → lives

Exception Note:

• Not all words ending in “-f” follow this rule:
• roof → roofs
• belief → beliefs

Usage Examples:

• The thief was caught by the police.
• The thieves were arrested.

Key Insight:

• Always check whether the word follows the -f to -ves rule or is an exception.

Exam Tip:

• “Thief → thieves” is a commonly asked irregular plural in exams.