fundamental, basic

basis, foundation / (martial arts) kihon

one thing

desire, want, craving

to desire, to crave

human, person, human being / personality, character / (Buddhism) literally meaning: "human society", referring to one of the six realms of reincarnation in Buddhist cosmology.

(archaic) the world in which people live; the world, society

(dated, rare) a place devoid of people

eros

a target, a mark, a bullseye / an objective, an object (of doing something)