It seems like you might be looking for the Latin word "plēnī", which is the genitive plural form of the adjective "plēnus" meaning "full".
Here's how you would pronounce it:
* plēnī: play-nay
The "ē" in "plēnī" is pronounced like the "e" in "they", and the "ī" is pronounced like the "ee" in "see".