This is the 2847th most frequent Japanese word.
おいしく
"Deliciously" or "tastily."
The word 'おいしく' is used as an adverb to describe how the action of preparing the dish was done, indicating that it was done deliciously.
この料理はおいしく作られています。
This dish is deliciously prepared.
Here, 'おいしく' functions as an adverb describing the manner of eating.
おいしく食べるコツを教えてください。
Please tell me the tips to eat deliciously.
In this sentence, 'おいしく' is an adverb describing the action of making, specifying that the action aims to make the cake delicious.