The phrase "lies obliquely" refers to something that is positioned or situated diagonally or askew. Antonyms for this phrase could include: straight, upright, vertical, horizontal, parallel, aligned, or perpendicular. These words suggest a sense of structure, order, and precision, which are contrasting to the vagueness and ambiguity of something that lies obliquely. For instance, a neatly arranged bookshelf could be described as straight or aligned, while a pile of books haphazardly stacked on top of one another may be described as lying obliquely. Overall, these antonyms suggest a sense of clarity and stability that is lacking in something that is oblique or askew in nature.