Word: puzzling
To perplex (someone).
To think long and carefully, in bewilderment. Example: We puzzled over the curious-shaped lock, but were unable to discover how the key should be inserted.
To make intricate; to entangle.
Time spent pondering something confusing.
Difficult to understand or explain; enigmatic or confusing; perplexing.
You can find a list of possible crossword clues for PUZZLING below.