January - precocity (noun) - the state of being unusually advanced or mature in development, especially mental development; the state or tendency to be flowering, fruiting, or ripening early, as in plants or fruit
February - imponderabilia (noun) - imponderables; things that cannot be precisely determined, measured, or evaluated
March - jalopy (noun) - an old, decrepit, or unpretentious automobile
April - amalgamate (verb) - to mix or merge so as to make a combination; blend; unite; combine; coalesce
May - gauche (adjective) - lacking social grace, sensitivity, or acuteness; awkward; crude; tactless
June - enisle (verb) - to make an island of; to place on an island; to isolate
July - Pavlovian (adjective) - of, relating to, or characteristic of Pavlov or his work, especially of experiments in which he elicited predictable responses from laboratory animals
August - opalesce (verb) - to exhibit a play of colors like that of the iridescent gem opal
September - sanguivorous (adjective) - feeding on blood, as a bat or insect
October - mellifluous (adjective) - (of a voice or words) sweet or musical; pleasant to hear
November - crepuscular (adjective) - of, relating to, or resembling twilight; dim; indistinct; (in zoology) appearing or active in twilight, as certain bats and insects
December - chelonian (adjective) - belonging or pertaining to a reptilian order comprising turtles, tortoises, and terrapins
2023
July - idiosyncrasy (noun) - something unique to an individual
August - cordiform (adjective) - heart-shaped
September - antithesis (noun) - a person or thing that is the direct opposite of someone or something else; a contrast or opposition between two things
October - quagmire (noun) - an awkward, complex, or difficult situation; a soft boggy area of land that gives way underfoot
November - horripilation (noun) - a bristling of the hair on the skin from cold, fear, etc.; goosebumps