Capable of becoming tired, exhausted, or worn out through use, stress, or effort.
From Latin 'fatigare' (to weary) + '-able' suffix. Used in both everyday and technical contexts since the 1700s, especially in materials science.
While 'fatiguable' sounds fancy, it just means 'able to get tired'—but when engineers say a material is 'fatiguable,' they're describing something with measurable limits. Modern engineering relies on understanding the fatiguability of everything from bridge cables to airplane wings.
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