This is the 15936th most frequent Turkish word.
ummadığı
"Unexpected" or "not anticipated."
The word 'ummadığı' is derived from the verb 'ummak' meaning 'to expect'. Here, it modifies 'surprise' ('sürpriz'), indicating that she did not expect this surprise, giving the meaning of 'unexpected' in this context.
Arkadaşlarının ona ummadığı bir sürpriz hazırlamış olması onu çok mutlu etti.
The fact that her friends prepared an unexpected surprise for her made her very happy.
In this sentence, 'ummadığı' describes the moment when the action took place ('bir anda'), implying that the door opening happened unexpectedly.
Annesi ummadığı bir anda kapıyı açtı ve onu görünce sevindi.
Her mother opened the door unexpectedly and was happy to see her.
Here, 'ummadığı' modifies 'bir şekilde' ('in a way'), communicating that the manner in which the success happened was unexpected to her.