upstream
How to Use Upstream
Learner’s notesIn plain EnglishAgainst the current of a river, or — figuratively — earlier in a chain of events that affects everything after it.
Word Forms
further upstream comparative, farther upstream comparative, further upstream comparative, farther upstream comparative, upstreamed past tense, upstreams plural, upstreams singular, furthest upstream superlative, farthest upstream superlative, furthest upstream superlative, farthest upstream superlative
Fill the Gap
Can you complete this real example?
Salmon swim _____ to reach their spawning grounds.
Etymology
From up- + stream.