A: Johnny lost the game to his long-time opponent. Disappointment was writ large on his face.

B: He never went all out on the court. Things have been like this since he was 15 and played his first game as a pro. The man was no more than the boy writ large.

Note: This idiom means “signified, expressed, or embodied with greater magnitude, in a bigger form.” “Writ” is an old spelling of “written.” “Writ large” then means “written large,” or literally written in large letters, large in size. If something is written in large letters, it is clearly legible and easy to read. Hence, metaphorically speaking, if something is described as writ large, it is big and magnified, clear and unmistakable.