noun
a widespread and severe windstorm that moves rapidly along a fairly straight path and is associated with bands of rapidly moving thunderstorms.
Derecho means both “right” and “straight” in Spanish and comes from Latin dīrēctus, “straightened,” the source of English direct and adroit (through French droit). The Latin word for “right,” however, is dexter, which survives in ambidextrous. Derecho was first recorded in English in the late 1880s.
EXAMPLE OF DERECHO USED IN A SENTENCE
A long series of derechos and thunderstorms wended their way across the continent from early June through late August.
The yestr- part of yestreen is a shortened form of yesterday, which comes from Old English. The -een element is the same as that in Halloween; it’s short for even, an archaic word for “evening.” Yestreen was first recorded in English in the mid-14th century.
EXAMPLE OF YESTREEN USED IN A SENTENCE
They were so tired yestreen that they collapsed in their beds shortly after sunset.
Casefy comes from Latin cāseus, “cheese,” which is also the source of English cheese as well as Portuguese queijo and Spanish queso. Meanwhile, French fromage and Italian formaggio come from Latin fōrmāticum, originally with the sense “something formed, molded.” Casefy was first recorded in English in the 1870s in an earlier medical sense.
EXAMPLE OF CASEFY USED IN A SENTENCE
They found that the milk would slowly casefy if left in the vat too long.