Solidus

Until today, I didn’t know the name for the fusible metal used to attach wires to a printed circuit board. It is called solder (U.S. /ˈsɑdər/), which ultimately comes from the Latin adjective solidus, meaning “solid”, and it makes sense. Needless to say, the adjective solid itself also comes from solidus. There are some more words of the same origin.

solidus

Solidus itself remains in English and refers to “a gold coin of the Roman empire”¹. This is because the coin was composed of relatively solid gold.

consolidate

English word consolidate means “to combine several things, especially businesses, so that they become more effective”, with the prefix con- meaning “together”. The word solidate means “to make solid”, but it is not commonly used today.