Adj + 透 + 了

[Adj/Verb + 透 + 了], to indicate the greatest degree possible, generally, negative adjectives are used.

透 means thorough and full, it is no concrete meaning, just indicate the exaggeration;

了 indicates the completion of an action;

1, [adj + 透 + 了], to indicate the greatest degree possible, (generally, negative adjectives are used)

eg) 伤心透了 = very very sad, （糟糕, 坏, 麻烦...）

2, [verb + 透 + 了], to indicate the greatest degree possible,

eg) 看透了 = seen through