This is the 3690th most frequent Japanese word.
いまいち
"いまいち" means "not quite good enough" or "lacking satisfaction."
It expresses that the speaker feels the cake lacks a satisfactory quality or flavor.
このケーキはいまいちです。
This cake is not very good.
It illustrates that the speaker feels the explanation was somewhat unclear or insufficient.
彼の説明はいまいち分かりませんでした。
I didn't fully understand his explanation.
It conveys a mild dissatisfaction or feeling that the design could be better.