Fromun- +‎dated.

undated (notcomparable)

1. Notmarked with adate.
2. Of astyle that will not go out offashion; aclassic.

FromLatinundatus, past participle ofundare(“to rise in waves, to wave, to undulate”).

undated (comparativemoreundated,superlativemostundated)

1. (botany) Rising and falling in waves toward the margin, as a leaf;waved.

• daunted

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