Tolerate

ABIDE

Put up with something patiently, as in enduring a difficult situation.

The clue "Tolerate" hints at the answer "ABIDE," which means to endure or put up with something. It’s a straightforward definition without wordplay, as "abide" is a direct synonym for "tolerate." If you think of phrases like "abide by the rules," it reinforces the idea of accepting or enduring something. The answer fits neatly into the grid as a concise, four-letter word.