vienam

In a sentence

• Aš likau vienam kambaryje.

  I stayed alone in the room.

  Here, 'vienam' indicates 'alone', referring to the speaker being the only person in the room.

• Šis klausimas svarbus tik vienam žmogui.

  This question is important to only one person.

  In this sentence, 'vienam' means 'to one', referring to a specific individual that finds the question important.

• Pagalbos prašė vienam draugui.

  He asked for help for one friend.

  Here, 'vienam' means 'for one', showing the recipient of the help being a singular friend.