тяжесть înseamnă în Engleză

burden [burdens]▼(responsibility, onus)
noun
[UK: ˈbɜːd.n̩] [US: ˈbɝː.dn̩]

heaviness▼(weightiness)
noun
[UK: ˈhe.vɪ.nəs] [US: ˈhe.vɪ.nəs]

heft▼(heaviness, the feel of weight)
noun
[UK: heft] [US: ˈheft]

rigour [rigours]▼(higher level of difficulty)
noun
[UK: ˈrɪ.ɡə(r)] [US: ˈrɪ.ɡər]