This is the 1120th most frequent Russian word.
утра
"Утра" means "morning" (genitive case of "утро").
'С самого утра' means 'since early morning,' with 'утра' in the genitive case used as a part of the phrase.
С самого утра было прохладно.
It has been chilly since early morning.
Here, 'утро' (morning) is used in the genitive case 'утра' to indicate a time reference in a habitual action.
Каждое утро я пью кофе.
Every morning I drink coffee.
In this context, 'утра' indicates the time before morning, used in the prepositional sense 'до утра' (by morning).