upstream Meaning and Definition
1. a. in the direction against a stream's current
2. r. toward the source or against the current
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Synonyms Gargantuan ambitious arduous backbreaking ball-buster bothersome burdensome challenging crucial demanding difficile effortful exacting formidable galling hard hard-won heavy herculean immense intricate irritating labored laborious man-sized no picnic not easy onerous operose painful problem problematic prohibitive rigid severe stiff strenuous titanic toilsome tough troublesome trying unyielding uphill upstream wearisome
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