proportionality

to vary directly, to be directly proportional to

(algebra) variable / (computing) variable

two things [small or without a counter category]

alias; nickname

(split) into exactly two equal parts

Alternative form of 真っ二つ

(idiomatic) as alike as two peas in a pod, very similar (often of family members)

(idiomatic) people as alike as two peas in a pod, very similar (often of family members)

chickens come home to roost, so you should be prepared for your curse to come back to you. Also said to admonish someone against cursing another person casually.