By surface analysis, চির (cir) + কাল (kal)
চিরকাল • (cirokal)
- always, ever, forever
- continually, incessantly, perpetually
- Subhasha Bhattacarya, Sailendra Biswas, Sailendra Biswas, and Jnanendramohana Dasa (2022) “চির”, in Digital Dictionaries of South India [Combined Bengali Dictionaries]
- Accessible Dictionary, Bengali-English, চিরকাল, Government of Bangladesh