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βαθύς
Lemma: βαθύς
Translation: deep; profound (adjective)
Etymology: From Proto-Indo-European *gʷeh₂dʰ- ('to sink, immerse'). The concept of depth in βαθύς has remained remarkably stable since ancient times. English 'bath' shares this root, originally referring to immersion in water. The metaphorical extension to intellectual depth ('profound') parallels English usage.