hoiatas

In a sentence

• Ta hoiatas mind ohu eest.

  He warned me about the danger.

  In this sentence, 'hoiatas' is the past tense of the verb 'hoiatama', used here to indicate an action of alerting someone to a potential risk.

• Meid hoiatas tugev vihm, mis algas ootamatult.

  A heavy rain, which started unexpectedly, warned us.

  Here, 'hoiatas' personifies the rain to metaphorically imply that it served as a warning.

• Õpetaja hoiatas õpilasi, et homme tuleb kontrolltöö.

  The teacher warned the students that there will be a test tomorrow.

  Here, 'hoiatas' demonstrates a direct warning or forewarning about an approaching event.