one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument

potential energy

(phonetics) place of articulation

usual location

each person

to turn on, to switch on

zero on a test etc., no points earned / freezing point / zero (value of a function’s independent variables when the value of the function is zero)

first discoverer (used especially in reference to the discovery of a dead body)

the best or top person, such as the best performer in a company, or a leading expert

Alternative form of 一々