stiff

In marine work, a stiff wind is one blowing at force 6 or above on the Beaufort scale, typically 25 knots or more. The term describes wind strong enough to affect vessel handling, require adjustment of sail plan, or demand respect from crews working on deck or in the rigging. A stiff breeze will heel a sailing vessel noticeably and make small craft work harder against the sea state it generates.

Shipyard workers use stiff the same way: a stiff gale means conditions severe enough to halt certain operations. Crane work becomes marginal or impossible; painters cannot apply coatings; welders may struggle with spatter control. The threshold varies by task. Launching a vessel demands calmer air than general fitting out. A stiff wind also affects structural loads on the hull during construction, shifting stress patterns that must be accounted for if heavy components are being positioned.

Where stiff sits in the weather vocabulary

Fresh, strong, stiff, and gale form a loose hierarchy. A fresh wind (force 5, roughly 19 knots) is noticeable but manageable. Stiff pushes into harder territory. A gale (force 8 or 9) is severe enough that people speak of it differently. The word stiff is practical rather than precise, which is why mariners still reach for it: it conveys muscle without triggering the emergency protocols that gale does.

The etymology reflects Anglo-Saxon directness. Stiff originally meant rigid or unyielding. Applied to wind, it carried the sense of force that does not bend, that resists compromise. A stiff drink is one that does not yield its bite; a stiff upper lip does not fold under pressure. Wind described this way announces itself as something to reckon with, not forecast around.