This is the 377th most frequent Finnish word.
metrin
The Finnish word "metrin" is the genitive singular form of "metri," meaning "of a meter" or "a meter's."
Here, "metrin" is used to specify the length of the step taken.
Hän otti vain yhden metrin askeleen.
He took only a one-meter step.
In this sentence, "metrin" is used in a measurement context to denote cost per meter.
Liput maksoivat kymmenen euroa metrin kävelymatkaa.
The tickets cost ten euros per meter of walking distance.
In this sentence, 'metrin' is used as a partitive singular form of 'metri', referring to a measurement in combination with a numeral.