She opened her mouth to speak.

The opening in the face used for eating, speaking, and breathing.
He put food in his mouth.
The baby smiled and showed her mouth.
She covered her mouth when she laughed.
open mouth
shut mouth
mouth full
oral cavity
maw
gob
She opened her mouth to speak.

The opening in the face used for eating, speaking, and breathing.
He brushed his teeth in the mouth.
The doctor examined her mouth.
He ate with his mouth full.
dry mouth
open mouth
mouth sore
oral cavity
maw
gob
He mouthed the words silently.

To speak or say something, often in a way that is not clear.
She mouthed a greeting from across the room.
The actor mouthed his lines during the rehearsal.
He mouthed the lyrics to the song quietly.
mouthed words
mouthed silently
mouthed a response
gestured
signaled
articulated
She opened her mouth to speak.

The opening in the face used for eating, speaking, and breathing.
He put food in his mouth.
The baby smiled and showed her mouth.
Close your mouth when you chew.
open mouth
shut mouth
mouth full
jaw
muzzle
orifice
She opened her mouth to speak.

The opening in the face used for eating and speaking.
He smiled and opened his mouth.
The baby cried with its mouth wide open.
She covered her mouth to hide a yawn.
open mouth
shut mouth
mouth full
jaw
muzzle
oral cavity