непривы́чка

Examples

• От непривычки к жаре мы быстро устали.

  We quickly grew tired because we weren't used to the heat.

• От непривычки у него болели руки.

  His arms hurt because he wasn't used to it.

• По непривычке она долго не могла заснуть.

  Because she wasn't used to it, she couldn't get to sleep for a long time.