laborious

characterized by toilsome effort to the point of exhaustion; especially physical effort; "worked their arduous way up the mining valley"; "a grueling campaign"; "hard labor"; "heavy work"; "heavy going"; "spent many laborious hours on the project"; "

पंजाब राज्य भारत की मुस्कुराती आत्मा है। यह परिश्रमी, ऊर्जावान, उत्साही और साहसी नागरिकों के लिए प्रसिद्ध है।

Construction of building is quite a labourious job.