EXAMPLES FROM THE WEB FOR CLOSE-MOUTHED
Pender came without yelling, grim and grey and close-mouthed.
Still, these out-landers were mighty mean, close-mouthed folks!
Close-mouthed as sea clams after being shipped to Kansas City.
Edmund knew where we were going, but he was as close-mouthed as an oyster.
When he chose, Percy could be as close-mouthed as his father.
He was a misshapen, pain-racked man, hard-handed and close-mouthed.
When "comp'ny" were present he was as close-mouthed as a clam and as noiseless as a crab.
Since the day she married, she's been close-mouthed as an oyster.
She was close-mouthed and therefore sympathetic with the quality in others.
You know how close-mouthed I am; you can safely tell me anything!