trínarb

Particle

 * 1) through which/whom is
 * 2) * Revenue: Irish Tax and Customs, Próiseáil faoi Rialú Custaim / Processing under Customs Control:
 * I gcásanna áirithe, is féidir le trádálaithe iarratas a chur isteach ar Phróiseáil Isteach agus ar Phróiseáil faoi Rialú Custaim le nós imeachta simplithe trínarb ionann an dearbhú iontrála earraí agus iarratas ar an nós imeachta.
 * In some instances traders may apply for Inward Processing and Processing under Customs Control using a simplified procedure whereby the declaration of entry for the goods constitutes an application for the procedure.

Usage notes
Especially in the spoken language, it is more common to use the indirect relative particle with a resumptive prepositional pronoun: