This is the 9185th most frequent German word.
m
"M" in German is an abbreviation for "mit," meaning "with."
Here, 'm' is a shortened form of 'am,' which is a contraction of 'an dem' (at the), used here to indicate 'at the time of.'
Ich stehe um 7 Uhr m Morgen auf.
I wake up at 7 a.m. in the morning.
Here, 'm' is also a shortened form of 'im,' which is a contraction of 'in dem' (in the), used to specify location.
Sie ist m Garten und liest ein Buch.
She is in the garden reading a book.
Here, 'm' can be understood as a contextual usage within a specific idiomatic expression in the German language.