This is the 19600th most frequent Korean word.
어머니도
"어머니도" means "mother too" or "mother as well" in English.
In this sentence, '어머니도' means 'Mother also', indicating that she, like someone else previously mentioned, likes the movie.
어머니도 그 영화를 좋아하신다고 했어요.
Mother also said she likes that movie.
Here, '어머니도' conveys 'Mother also', showing that she went to the store in addition to other people.
어머니도 가게에 가셨어요.
Mother also went to the store.
In this case, '어머니도' is used to mean 'Mother also', clarifying that, like others in the conversation, she expressed a desire for coffee.