each other; one another

Peter (name)

the opposite bank of a body of water or a distant goal

to occur repeatedly or break out one after another, especially regarding social phenomena, protests, or conflicts

Saint Petersburg (city in Russia)

at that time

know yourself, know your enemy (idiom, from Sunzi's "The Art of War")

To attend to one thing while neglecting another; unable to manage multiple tasks or aspects simultaneously.

Peter Pan, the novel character

Pilate (Pontius Pilate in the Biblical passion story)

(idiom) you and me both; that makes two of us

Describing a situation where there are only two mutually exclusive possibilities; either this or that.

to favor one and discriminate against the other

to rise and fall in succession, describing sounds or actions occurring one after another in different places

to be on very close terms, treating each other with the familiarity of a single unit or family

Saint Petersburg, Russia, or other geographic locations named Petersburg

Montpellier (French town)

One declines while the other flourishes; one loses out when the other one gains (as in a trade-off or a zero-sum game).

to know the enemy and know oneself (idiom, from Sunzi's "The Art of War")

Petrograd (former name of Saint Petersburg)

Pilates (physical fitness system) (Taiwanese usage)

Perm, Russian city in the Urals

Petrovich (name)

to chorus someone else's lead; to chime in in agreement

know yourself and know your enemy, and you will never be defeated

red spider lily (Lycoris radiata) or cluster amaryllis

knowing the enemy and yourself will get you unscathed through a hundred battles (idiom, from Sunzi's "The Art of War")

(loanword) rabbi

Abijah (biblical name)

that was one thing, and this is another; times have changed and circumstances are different now

the Second Epistle of Peter in the New Testament

First Epistle of Peter (in the New Testament)

to chorus someone else's lead; to chime in in agreement