'Even' idiomatic expressions

The word 'even' has different meanings in English and it can be found in different grammatical roles (as a verb, as an adjective or as an adverb).

Idioms / expressions
Get even with somebody: to be revenged / retaliate
On an even keel: in a stable or unimpaired state
Break even: to have one’s profits equal one’s loses / neither lose nor win
Even chance: equal probability
Even bargain: fair / just bargain
Even stevens: If everything is equal between people, they are even Stevens
Even voice: calm / placid voice
Have an even temper: not readily moved or excited / calm / placid  (adj.: Even-tempered)
Even money: a bet in which the winnings are the same as the amount staked
Even-handed: treating everyone fairly and equally
Even the score: pay somebody back / repay / reciprocate / get even
Even a blind squirrel finds a nut once in a while:  Even if people are ineffective or misguided, they can be correct sometimes just by being lucky.

Phrasal verbs
Even something out: make or become level / smooth / stabilize
Even something up: balance / equal