Definitions

upstream

[uhp-streem] / ˈʌpˈstrim /

ADJECTIVE

difficult

Synonyms

STRONGEST

ambitious arduous burdensome challenging crucial demanding laborious onerous painful problematic severe strenuous tough troublesome

WEAK

backbreaker bothersome difficile easier said than done effortful exacting formidable galling gargantuan hard-won heavy herculean immense intricate irritating labored no picnic not easy operose problem prohibitive rigid stiff titanic toilsome trying unyielding uphill wearisome

Antonyms

STRONGEST

easy effortless facile helpful nice trivial

WEAK

calm free friendly manageable plain simple sociable straightforward uncomplicated

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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upstream

Recent surveys found signs that water voles had established themselves both upstream and downstream of the original release site.

From BBC ● Aug. 14, 2026

BP said it now expects upstream production of between 2.18 million and 2.27 million barrels of oil per day, down from 2025’s figure of 2.31 million barrels.

From MarketWatch ● Aug. 4, 2026

One major obstacle was that a single spacecraft could not observe the undisturbed solar wind upstream of Mars while also measuring atmospheric ions escaping closer to the planet.

From Science Daily ● Aug. 3, 2026

"Records for both upstream production in Brazil and refinery utilisation have helped counter hindered Middle East output," noted Keith Bowman, equity analyst at Interactive Investor.

From Barron's ● Jul. 30, 2026

Ruta Skadi walked a little way upstream, and Serafina Pekkala went with her.

From "The Subtle Knife" by Philip Pullman

upstream

Example Sentences

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Related Words