Hiatus

google

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mid 16th century (originally denoting a physical gap): from Latin, literally ‘gaping’, from hiare ‘gape’.

wiktionary

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Borrowed from Latin hiātus(“opening”) (mid-16th century), from hiō(“stand open, yawn”).

etymonline

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hiatus (n.)

1560s, "break or opening" in a material object, especially in anatomy, from Latin hiatus "opening, aperture, rupture, gap," from past participle stem of hiare "to gape, stand open," from PIE root *ghieh- "to yawn, gape, be wide open." Sense of "gap or interruption in events, etc.;" "space from which something requisite to completeness is absent" [Century Dictionary] is recorded from 1610s.