Today's word is FUMUS, which is a second-declension masculine noun.
Latin meaning and usage: The basic meaning of the word is "smoke" or "steam" or "fumes."
Latin word formation: The root is highly productive, giving rise to many verbs such as fumo, fumesco, fumifico, and compound verbs like effumo. There are also various nouns such as fumator and fumarium, as well as adjectives like fumosus and fumifer.
English cognates and derivatives: We get the English word "fume" from this Latin word, along with "fumigation."
Here are some examples of today's word in Latin sayings and proverbs; for more examples, see the page at the Scala Sapientiae, which also contains notes on some of the proverbs cited below:
De fumo ad flammam.
Defecerunt sicut fumus dies mei.
Flamma fumo est proxima.
Fumum fugiens, in ignem incidi.
Fumus, ergo ignis.
Homo humus, fama fumus, finis cinis.
Post mortem fumus, pulvis et umbra sumus.
Semper flamma fumo proxima est.
Vita mortalium cinis est et fumus.
Vitandus fumus, in ignem ne incidas.
Dum vito fumum, flammam in ipsam decido.
Fumum pro fulgore dat.
Praenuntiat fumus incendium.
Fumus sumus, fimus fimus.
Non est fumus absque igne.
De fumo disceptant.
Patriae fumus igni alieno luculentior.
Ex fumo dare lucem.
Ex igne ut fumus, sic fama ex crimine surgit.
Fumo comburi nihil potest, flamma potest.