Build up and gather both grow a holding, but they describe different actions. Build up is to increase, develop or strengthen something gradually, course by course — you build up reserves, strength, momentum or tension. Gather is to bring scattered things together into one place, here and now — leaves, papers, a crowd. Build up is the steady developing-up; gather is the sweep that brings the scattered in.
Both can leave you with more, so 'build up reserves' and 'gather reserves' can overlap — but the motion differs. Build up, the everyday phrasal verb, stresses a thing growing sturdier over time: layer on layer, rep on rep, it strengthens. Gather, from gaderian, stresses bringing the spread-out together, often at a moment and usually by someone — gather the children, gather firewood. So an athlete builds up stamina (it develops within), while a forager gathers berries into a basket (they are brought in). One develops; the other collects the scattered.
build up
To build up is to increase or strengthen something step by step until it amounts to something solid — reserves, muscle, momentum, a reputation, or the tension before a release. It is the hands-on, everyday twin of accumulate: where things accumulate almost on their own, you build up by adding deliberately, one layer onto the last. The phrasal verb leans toward development and strength, and it cuts both ways — you can build up savings and stamina, or let pressure build up until something finally gives.
gather
To gather is to bring scattered things together into one place — leaves into a heap, papers off a desk, a crowd into a square. It is the plainest, most general member of its family: where you collect by careful selection and things accumulate almost on their own, you simply gather whatever is spread out and draw it in. From the Old English gaderian, 'to bring together', it serves the concrete (gather wood) and the abstract alike (gather evidence, gather your thoughts).
| build up | gather | |
|---|---|---|
| Meaning | increase, develop or strengthen gradually | bring scattered things into one place |
| Action | a thing develops or strengthens | the spread-out is swept in |
| Over | time, layer by layer | often a single moment |
| Sense | growing sturdier | bringing the scattered together |
| Often with | reserves, strength, momentum, tension | leaves, papers, a crowd, wood |
| Noun | buildup | gathering |
Both grow a holding — the split is develop vs sweep. Build up is the brick wall: a thing strengthens or grows over time, course by course (build up strength, build up reserves). Gather is the rake: scattered things are brought together, here and now (gather leaves, gather a crowd). If something develops or strengthens, you build it up; if you bring the scattered in, you gather it. Tip: you build up muscle (it develops); you gather sticks (they are collected).
build up
- iHe built up his savings over a decade of small deposits.
- iiStorm clouds built up all afternoon before the rain.
- iiiShe built up the confidence to speak in public.
gather
- iChildren gathered shells along the tideline.
- iiA crowd gathered as the band began to play.
- iiiHe gathered the documents he needed for the meeting.
They overlap for reserves or forces — pressure can build up (develop) or be gathered (brought together) — but build up suits things that strengthen from within over time, while gather suits bringing scattered items into one place. You build up stamina; you gather firewood. You would not 'gather' your confidence the way you build it up.