(idiomatic) to be vulnerable / (sumo) poor at preventing one's opponent from getting an underarm grip

a surname

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)

to turn on, to switch on

triple point

a speck; a spot / a little bit

(geography) south pole

pressure points

red marks that are applied to Chinese texts to aid in reading it as Japanese

in kambun, a type of kaeriten written as レ that indicates that the character should be returned to and read later; a return-mark