To express "in" you would typically use a combination of prepositions, suffixes, and other grammatical elements depending on the context.
For example:
* "In the house" would be "iglu-mi" (iglu - house, -mi - locative suffix indicating "in").
* "In the water" would be "imi-mi" (imi - water, -mi - locative suffix indicating "in").
So, there's no direct translation for "in" like in English. It's incorporated into the structure of the sentence.