IPA: //vɛsˈmɛntəl//
KK: /vɛstˈmɛntəl/
This word describes something that is related to or resembles a type of clothing worn during religious ceremonies.
The priest wore a vestmental garment during the service.
The word 'vestmental' is derived from 'vestment' (from Latin 'vestimentum', meaning clothing or garment) and the suffix '-al' (meaning pertaining to). Thus, 'vestmental' refers to something that pertains to clothing or garments.
Think of 'vestment' as relating to clothing, and remember that 'vestmental' means pertaining to garments.