Hotline etymology

English

English word hotline comes from English hot, English line

Detailed word origin of hotline

Dictionary entry Language Definition
hot English (en) (incomparable) Electrically charged.. (informal) Radioactive. [from the 20thc.]. (informal) Very good, remarkable, exciting. [from the 19thc.]. (of a person or animal) Feeling the sensation of heat, especially to the point of discomfort.. (of a temper) Easily provoked to anger.. (of an object) Having a high temperature.. (of food) Spicy.. (of the weather) Causing the air to be hot.. (slang) [...]
line English (en) (transitive, now, rare, of a dog) to copulate with, to impregnate. (obsolete) Flax; linen, particularly the longer fiber of flax. (transitive) To cover the inner surface of (something), originally especially with linen.. (transitive) To fill or supply (something), as a purse with money.. To reinforce (the back of a book) with glue and glued scrap material such as fabric or paper. (baseball, [...]
hotline English (en) To communicate over a telephone hotline. A direct line between two people, especially one between heads of state to be used in an emergency.. A telephone line that is always staffed and able to give immediate assistance.