warm homosexual 3 realizations
ACCEPTED Realization 1
type Derivation
language German
lexeme 1 schwül
lexeme 2 schwul
meaning 1 warm, stuffy
direction
meaning 2 gay, homosexual
reference DWDS
comment In colloquial speech, the umlautless form schwul takes on the meaning 'homosexual' (c. 1900) 
ACCEPTED Realization 2
type Derivation
language German
lexeme 1 warm
lexeme 2 warmer Bruder
meaning 1 warm
direction
meaning 2 (obsolete, slang) homosexual
reference DWDS
comment Robert Beachy (2014) Gay Berlin, Knopf Doubleday: “As early as 1782 one guidebook devoted a short chapter to Berlin's “warm brothers” and the prevalence of male prostitution as an income source for garrisoned soldiers.
ACCEPTED Realization 3
type Polysemy
language Hungarian
lexeme meleg
meaning 1 warm meleg víz
warm water
direction
meaning 2 homosexual meleg nő
lesbian (lit. homosexual woman)
reference MEK 1978
comment Possibly, the Hungarian expression has been calqued from German.