IPA: /ˈtreɪnˌbɛə.rər/
KK: /ˈtreɪnˌbɛrər/
A person who carries or holds the long part of a dress or robe, especially during a formal event or ceremony.
The trainbearer walked gracefully behind the bride, ensuring her gown flowed beautifully.
Trainbearer → The word is formed from 'train' (from Old French *traïner*, meaning to pull or drag) and 'bearer' (from Old English *beran*, meaning to carry). A trainbearer is someone who carries or pulls a train or a procession.
Think of someone who 'carries' ('bearer') something that is 'pulled' or 'dragged' ('train') — that's why a trainbearer is someone who carries a train.