二

Yojijukugo

in earnest; single-minded; with intense concentration; rushing headlong into

one and only; unique

above all else

double-edged eyelid

both

Idiomatic expression

to chase after two hares; to try and do two things at the same time

double exposure

"Helping Hands" comedy performance; performance in which one person wears a haori on their shoulders, while another person behind them puts their arms through the sleeves of the haori and feeds the person in front

double helix (structure of DNA)

just the two of them

two-front war

in no way

Proverb

God doesn't give with both hands; God does not give two gifts; heaven does not grant people more than one talent

visiting a shrine on New Year's Eve and staying there until (or returning on) New Year's Day

two adjoining rooms (connected by a sliding door)

two-family house; house for a two-generation family

Mathematics

quadratic function

mistress; kept woman; No. 2

the two leading actors (in a play); the two star players; the two distinctive features; the two main items (attractions)

house mouse (Mus musculus)

double murder

secondary infection

to be faced with the choice between two alternatives; to be presented with two difficult choices

Second World

Proverb

if you run after two hares you will catch neither