A method of extracting gold and silver from their ores with a solution of sodium cyanide / A process of case-hardening iron or steel by immersing it in molten cyanide and then quenching in water or oil

(colloquial) Nearly impossible to sell to others.

Alternative spelling of future-proof

Alternative spelling of future-proof

(surgery) Any of various medical instruments used to explore wounds, organs, etc. / (figuratively) Something which penetrates something else, as though to explore; something which obtains information.

(transitive, intransitive) To explore, investigate, or question / (transitive) To insert a probe into.

Anything, such as a tampon or sanitary towel, used for handling menstrual discharge.

A predisposition or natural inclination, propensity, or a predilection; especially, a strong disposition or bent.

(statistics) A distribution of all possible values of a random variable together with an indication of their probabilities.

An oil used not for lubrication but as a component of another material, or as a carrier of other products.