No. 732 in Greek

οποίων

"Of whom" or "of which" (possessive relative pronoun).

In a sentence

Οι φίλοι μου, η βοήθεια των οποίων είναι ανεκτίμητη, είναι πάντα πρόθυμοι να με στηρίξουν.
My friends, whose help is invaluable, are always ready to support me.
The word "οποίων" refers to the noun "φίλοι" (friends) and is used to indicate possession (their help). It is the genitive plural form of the relative pronoun.
Το πρόγραμμα των μαθημάτων, στα πλαίσια των οποίων δουλεύουμε, είναι πολύ απαιτητικό.
The curriculum, within the scope of which we work, is very demanding.
The word "οποίων" is used here to relate "μαθήματα" (subjects) to "πλαίσια" (scope), implying that the scope pertains to the subjects in the genitive plural.
Οι κανόνες, τα κριτήρια εφαρμογής των οποίων είναι αυστηρά, πρέπει να ακολουθούνται.
The rules, the criteria for the application of which are strict, must be followed.
Here, "οποίων" connects "κανόνες" (rules) with "κριτήρια" (criteria), illustrating a relationship of possession in the genitive plural case.

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