Kurielaison
The transliteration of Greek is "Kyrie-laison". This literally means Lord (Kyrie) Have Mercy (eleison). This prayer can be found in various NT verses, most importantly in Matthew 17:15 - "Lord have mercy (Kurie elaison) on my son". Our basic request to God is that He have mercy upon us. Eleos is defined as "mercy; kindness or good will toward the miserable and afflicted, joined with a desire to relieve them". This mercy of God was shown to us in its full depth when Christ died for us on the cross. When we pray Kurielaison we are asking for us to continue to experience that salvation in Christ.
(Source: Rev. Fr. Sujit Thomas)