This is the 3691st most frequent Japanese word.
いも
"いも" means "potato" or refers to root vegetables like yams or sweet potatoes.
Here, 'いも' refers to the vegetable, illustrating its use as a noun referring to potatoes or similar tubers.
いもがたくさん育ちました。
Many potatoes grew.
In this sentence, 'いも' is used within a compound word '焼きいも' to refer specifically to a dish made from potatoes.
冬には焼きいもが人気です。
In winter, roasted sweet potatoes are popular.
'いも' is modified by 'さつま', specifying the type of potato, hence demonstrating 'いも' as a base noun for different potato species.