1. One's native language; the language learned by children and passed from one generation to the next
   - mother tongue, first language

Type of: natural language, tongue

• impreciseness
• imprecision
• impregnability
• impregnable
• impregnably
• impregnant
• impregnate
• impregnation
• impresa
• impresario
• impress
• impressed
• impressibility
• impressible
• impression
• impressionability
• impressionable
• Impressionism
• impressionist
• impressionistic
• impressive
• impressive aphasia
• impressively
• impressiveness
• impressment