Gudgeon (noun) (archaic)
A credulous or easily fooled person.
Gudgeon also has many definitions still in use. The pivot on which a bell rotates, the tubular part of a hinge, a pin holding two stone blocks together.
Middle English: from Old French goujon, diminutive of gouge (see gouge).
“Has the old gudgeon never heard of a celebratory glass of champagne?”
Machree (noun) (Irish/Scots)
As a form of address: my dear. Now chiefly in “Mother Machree”, expressing (usually ironically) a stereotyped conception of Celtic or Irish identity.
Late 17th century; earliest use found in Irish Hudibras. From Irish mo chroí (Scottish Gaelic mo chridhe) my heart, my beloved from mo my + croí (Scottish Gaelic cridhe) heart from Early Irish cride heart, cognate with heart [interjection, adverb].
Lixiviate (verb) (chemistry) (archaic)
Separate (a substance) into soluble and insoluble constituents by the percolation of liquid.
Mid 17th century: from modern Latin lixiviat- ‘impregnated with lye’, from the verb lixiviare, from lixivius ‘made into lye’, from lix ‘lye’.