κρύπτω

Unknown. The etymology determination is complicated by the fact that the word is both in sense and form similar with Ancient Greek καλύπτω (kalúptō), thus indicating possible (bi-directional) analogical influence.

Although the word often compared with semantically close Proto-Balto-Slavic *kr(o)uʔ-, e. g. Russian крыть (krytʹ), de Vaan notes that Balto-Slavic evidence demands a laryngeal while Greek excludes it.

Beekes suggested possible Pre-Greek origin due to lack of Indo-European etymology, but acknowledged that the variation in labial (which he usually considered to be an argument for substrate origin) may be due to aforementioned analogy.

κρύπτω (krýpto) (past έκρυψα) passive -κρύπτομαι (found in compounds)