Infrastructure means the structure beneath
A tiny etymology note that makes modern engineering infrastructure feel surprisingly literal.
Infrastructure comes from infra, meaning below, and structure, meaning something arranged or built.
That makes the engineering usage feel wonderfully literal. Infrastructure is the structure beneath visible work: the systems people do not always notice until they disappear.
The word carries a useful reminder for software too. If the layer beneath the work is confusing, fragile, or invisible in the wrong way, everything above it inherits that uncertainty.