This is the 1466th most frequent Turkish word.
ayağa
"To the foot" or "to the feet."
Here, 'ayağa' expresses 'standing up', indicating a transition to an upright posture.
Ayağa kalktı ve odadan çıktı.
He stood up and left the room.
In this sentence, 'ayağa' refers to the position of the feet to avoid stepping on something.
Ayağa basma, yerde cam kırıkları var.
Don't step on the ground; there are pieces of glass.
Here, 'ayağa' is part of an idiomatic expression ('ayağa kara çalmak') meaning to slander or tarnish someone's reputation.