'drought-tolerant' originates from the combination of 'drought,' which comes from Old English 'drūgath,' meaning 'dryness,' and 'tolerant,' from Latin 'tolerare,' meaning 'to endure.'

'drought' changed from Old English 'drūgath' to Middle English 'drouth,' and eventually became the modern English word 'drought.' 'Tolerant' evolved from Latin 'tolerare' to Middle English 'tolerant,' and eventually became the modern English word 'tolerant.'

Initially, 'drought' meant 'dryness,' and 'tolerant' meant 'to endure.' Over time, 'drought-tolerant' evolved to mean 'able to withstand dry conditions.'