teething russian

• проре́зывание

  cutting, teething, dentition, eruption of teeth

• ре́жущийся

  cuttable, that is being cut

  erupting (about teeth), teething

• ре́завшийся

  who had cut oneself, that was being cut

  teething

Examples

• У моего́ шестимесячного сы́на ре́жутся зу́бы.My six-month old son is teething.