No. 178 in Greek
οποίοι
"Οποίοι" means "which" or "who" (plural, masculine or mixed gender).
In a sentence
Οι φίλοι, οι οποίοι επισκέφθηκαν το μουσείο, ήταν ενθουσιασμένοι.
The friends, who visited the museum, were excited.
Used as a relative pronoun to introduce additional information about 'the friends'.
Αυτοί είναι οι μαθητές οι οποίοι κέρδισαν τον διαγωνισμό.
Those are the students who won the competition.
Used to specify the exact group of 'students' referred to.
Τα θέματα τα οποία συζητήσαμε ήταν σημαντικά.
The topics which we discussed were important.
Used as a relative pronoun to connect 'the topics' with the actions described.
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