Arduous and Perplexing

Arduous adjective – Requiring considerable physical or mental effort.

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Perplexing and arduous are semantically related. In some cases you can use "Perplexing" instead an adjective "Arduous".

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Nearby Word: arduously

Perplexing adjective – Lacking clarity of meaning; causing confusion or perplexity.

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Arduous and perplexing are semantically related. Sometimes you can use "Arduous" instead an adjective "Perplexing".

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Nearby Words: perplex, perplexity, perplexed, perplexedly