Spelling Debate: Fardu vs Fardhu in Religious Literacy

The use of the variant 'fardhu' is very common because writers attempt to preserve the transliteration of the letter 'dad' (ض) by using the 'dh' combination. This is done so that readers can distinguish between the sounds of the letters 'da' (د) and 'dad' (ض) when pronouncing religious terms.

This word is absorbed from the Arabic 'fard' (فرض), meaning obligation or burden. In its original morphology, it uses the letter 'dad' (ض), an emphatic consonant that has no direct equivalent in the Indonesian phonological system.

Sociolinguistically, the spelling 'fardhu' reflects the cultural proximity of Indonesian speakers to classical Islamic literary traditions. In boarding schools (pesantren) and religious education circles, the use of 'dh' is considered more 'Islamic' and tajwid-accurate compared to its simpler standardized form.