This is the 2424th most frequent Turkish word.
idi
"Idi" means "was" in English, indicating the past tense of "to be."
'İdi' here is used to signify that the weather being nice is an instance in the past.
Dün hava çok güzeldi.
Yesterday the weather was very nice.
'İdi' is used to indicate that the preference for the color blue was true in the past.
Onun en sevdiği renk maviydi.
His favorite color was blue.
'İdi' is used embeddedly to reflect a state of being busy as it was in the past context.