This is the 616th most frequent Hebrew word.
אבי
"My father."
Used as a name for 'my father', describing a familial relationship.
אבי עובד מהבוקר עד הערב.
My father works from morning till evening.
Used as a proper name, indicating it is an individual named 'Avi' whose actions are described.
אבי השיל את מעילו בגלל החום.
Avi took off his coat due to the heat.
Used metaphorically, 'אבי' means 'origin/founder', describing the source of the knowledge.