The language spoken in Korea and written in hanja, which evolved into Middle Korean by the 10ᵗʰ or 13ᵗʰ century, depending on the analysis.

In an old-fashioned manner.

plural of old soul

A reincarnated person. / A person of unusual maturity.

The Catalan language as it existed in the Middle Ages.

plural of old franc

(US, historical) A conservative political faction in the United States that opposed both New Deal domestic programs and US entry into World War II.

(chiefly Midland US, Southern US) The Devil.

The Devil.

(idiomatic) A seasoned sailor, especially one who is hardy and forthright in manner.