This is the 176th most frequent Spanish word.
mañana
"Tomorrow" or "morning," depending on context.
This usage combines both meanings of 'mañana': the future (tomorrow) and the morning, specifying the time on the next day.
¡Lo haré mañana por la mañana!
I will do it tomorrow in the morning!
In this sentence, 'mañana' is used to refer to the future—the day after today.
Mañana voy al mercado.
Tomorrow I am going to the market.
Here, 'mañana' means the earlier part of the day—the morning.