What does mishtachavim mean in Hebrew?

Answer 1

It's the present tense, feminine singular form of the verb hitgaber, which means "to overcome":

I (feminine) am overcoming = ani mitgaberet (אני מתגברת)

you (feminine) are overcoming = aht mitgaberet (את מתגברת)

she is overcoming = hi mitgaberet (היא מתגברת)

Answer 2

mi sheberach (מי שבירך) = "He who blessed..." or "the one who blessed..."

Answer 3

Mishtachavim (משתחווים) = bow down (present tense, masculine plural)