If you describe food as unpalatable, you mean that it is so unpleasant that you can hardly eat it. a lump of dry, unpalatable cheese
not pleasant or acceptable to the taste or mind; "an unpalatable meal"; "unpalatable truths"; "unpalatable behavior
If you describe an idea as unpalatable, you mean that you find it unpleasant and difficult to accept. It is an unpalatable fact that rape makes a good news story It was only then that I began to learn the unpalatable truth about John. = distasteful