Namaparadh (नामापराध)
Namaparadh means an offence against God, His names, forms, virtues, leelas, abodes, or Saints that deprives one of the fruits of devotion.
Namaparadh (नामापराध | nāmāparādha) means an offence against God.
An offence against God's names, forms, virtues, leelas, abodes, or His Saints is Namaparadh. Such offences deprive a person of the fruits of devotional practice.
Offence Against a Saint
Among all Namaparadh, offence against a Saint is the gravest. Saints are exceedingly dear to God.
These offences bring harmful consequences, which the offender must bear.
Go Deeper

Reference
Prema Rasa Madira - The Intoxicating Bliss of Divine Love, Vol. 1, Ch. 3

