(in amount, extent)
[responsibility] lourd(e)
→ A heavy responsibility rests on the opposition.
[fine] lourd(e)
→ lengthy jail sentences and heavy fines
[casualties] important(e)
→ There would be heavy casualties.
[traffic] dense
→ The traffic along Fitzjohn's Avenue was heavy.
[drinker, smoker] grand(e)
to be a heavy drinker être un(e) grand(e) buveur(-euse)
→ She had been a heavy drinker as long as I had known her.
heavy drinking consommation excessive d'alcool
→ He worried about her heavy drinking.