source
Old Frenchorigin, spring, fountain
About This Root
The root source traces back through Old French sourse to Latin surgere, "to rise, to spring up." The original image is water welling up out of the ground — a spring. A source was first literally the spot where a river begins, where water rises from below.
From that spring of water, English generalized the meaning to any origin: the source of a river, but also the source of a problem, the source of income, the source of a quotation. Wherever something "comes up from," that's its source.
Add re- (again, back) and you get resource — literally "a rising-up again," something that springs back to supply you when you need it. A resource is a source you can return to and draw from repeatedly: natural resources, financial resources, a library resource. The mental leap is from "a spring that keeps flowing" to "a supply you can keep tapping."
From resource comes resourceful — full of resources — describing a person who can always find a fresh spring of ideas or solutions when others run dry. A resourceful traveler stranded with no map still finds a way; they have inner springs to draw on.
The original "rising up" sense survives most clearly in upsurge: up + surge, a sudden rising — a surge being the same surgere root that gives us source. An upsurge in demand is a wave of it welling up all at once.
So the family flows from one picture: water rising from the ground. The spring is the source; a spring you return to is a resource; a person with many springs is resourceful; and a sudden swell is an upsurge.
Picture a spring of water rising out of the ground — that's the source. A spring you can return to and draw from again (re-) is a resource. A person full of such springs is resourceful. A sudden swell is an upsurge.
Core Words Deep Dive
The few words from this family worth telling in full — one by one.
Started as the literal spot where a river rises, then generalized to any origin: the source of a rumor, a source of income, a news source. The modern verb 'to source' (to obtain from a supplier) is recent business jargon — but it fits perfectly: you go back to the spring to get what you need.
re- (again) + source (spring) = 'a spring you can return to.' That's why resources are things you draw on repeatedly: natural resources, human resources, financial resources. Note the stress can shift — RE-source (n., AmE) vs re-SOURCE (v., to obtain) — and the meaning stays anchored in 'a supply to tap.'
resource + -ful = 'full of resources,' but applied to a person it means quick to find solutions — someone who always has an inner spring to draw on when others run dry. High praise: a resourceful employee solves problems without being handed the answer.
up + surge, where surge shares the surgere root with source. It's the family's clearest link to the original 'rising up' sense: an upsurge is a sudden welling-up — of demand, violence, interest. Stronger and more sudden than a simple 'increase.'
Related Roots
Both point to where things begin. source (from 'spring') stresses the place something flows or comes from — a source of water, income, information. orig (origin, original) stresses the moment or starting point of existence. Where it flows from → source; when/where it began → origin.
source comes from surgere, itself sub- (up from below) + regere (to lead straight) — the same regere behind reg/rect words. The 'rising straight up' of a spring shares its deep root with 'leading straight.'
Associated Words · 6
resource
available supply or assets that can be drawn upon
resourceful
Clever at finding practical solutions with available means
resources
Available supplies or assets used to achieve a goal
source
the origin or place something comes from; to obtain from a source
sources
Origins or places from which things come; to obtain or procure
upsurge
A sudden strong rise or increase