Do you know these words?

• こしを　あげる

  to raise one's rear end ; to raise one's lower back

• こしを　うかす

  to rise one's lower back

• こしを　うかせる

  to rise one's lower back

• げり（を）する

  to have diarrhea ; to have loose bowels

• げりどめ

  antidiarrheal medicine