A transliteration of the Spanish male given name Carlos / A transliteration of the Portuguese male given name Carlos

a four-wheeled vehicle, automobile, car

(Internet slang, dated) LMAO

this school / the main school, the head school

core of the issue / this article

人口密度: population density

(education) (female) nurse (a woman who takes care of other peoples’ young)

構文論: (linguistics) syntax (as a field of study), syntactics

分光法: spectroscopy

(Internet slang) an excessively cutesy style of writing stereotypically used by middle-aged men (thus making it inappropriate and creepy) on the LINE messaging app