This is the 2237th most frequent Japanese word.
芋
"芋" (いも, imo) means "potato" or "tuber."
Here, 芋 directly refers to the root vegetable, potato, being discussed in terms of a culinary context.
彼は芋を食べるのが好きです。
He likes eating potatoes.
In this sentence, 芋 is used to specify the type of ingredient, in this case sweet potato, in relation to the beverage.
芋焼酎は日本の伝統的な酒です。
Sweet potato shochu is a traditional Japanese alcohol.
Here, 芋 serves as a metaphorical term describing something plain, rural, or dated in appearance or style.