"supplication" in the noun sense
1. invocation, supplication
a prayer asking God's help as part of a religious service
2. supplication, plea
a humble request for help from someone in authority
3. prayer, supplication
the act of communicating with a deity (especially as a petition or in adoration or contrition or thanksgiving
"the priest sank to his knees in prayer"
Source: WordNet® (An amazing lexical database of English)
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