Where does “pinhole” come from?

I need to analyze this chain carefully, but I notice there's a significant problem: the chain provided doesn't actually support the headword "pinhole." The chain shows: - English hole → Old English hol → Old English helan → Latin oleum → Ancient Greek ἔλαιον → Latin oleum → Proto-Indo-European -kos This chain is for "hole" (and oddly includes "peen" and oleum/oil, which don't belong), but "pinhole" is a compound word made of "pin" + "hole." The chain only traces "hole," not the "pin" element. Additionally, there are internal inconsistencies in the chain itself (Latin oleum appears twice; the progression doesn't make linguistic sense). **I cannot write an accurate one-sentence etymology for "pinhole" based on this chain because:** 1. The chain doesn't include the etymology of "pin

pinhole (English): A small hole, of a size that could have been made...