Why "bien" is used to describe certain nouns (instead of an adjective).....

Bonsoir Leah, «Ce film s'est très bien passé» I was satisfied with the film, it went well. «Ce film m'a plu bien» I was satisfied with the film, it pleased me. Would you please provide the source for the information you gave? Merci en avance.

Bonjour Ron, I found it by googling.... https://frenchtogether.com/bien-bon/ Best, leah

Don't forget that "bien" has acquired also some other meanings apart from being the adverb of the adjective "bon/bonne". It also means, e.g., "many" as in: "Il y a bien des gens." -- There are many people. Or "Je te souhaite bien des choses." -- I wish you all the best. Then, in conjunction with the verb "être", both options bien and bon are frequently possible and connote a slightly different meaning. Il est bien -- He is good. Because the adverb "bien" refers to the verb "être". Il est bon. -- He is a good guy/person/athlete/etc. Here the "bon" refers to a substantive which must be inferred from context. Another example. Suppose you are invited to a family dinner and, after the meal, you make a compliment and say either: C'était bien. -- It was good (in the sense that the cooking was great, hence the adverb). C'était bon. -- It was good (in the sense that "it" refers to the meal, i.e., the meal was good). I hope this helps to clarify this sometimes confusing issue a bit. -- Chris (not a native speaker).

Merci beaucoup, Chris!