not expressed directly
oblique - indirect
‘Oblique’ is technically an angle characterized by a slanting or sloping direction, but has been adapted to refer to something which is not expressed or done in a direct way. Therefore, if something is oblique, it is not clearly or openly stated, making it difficult to understand.
Chris didn’t apologize. He just made an oblique admission of guilt for the error and then moved on.
The journalist obliquely referred to a widespread conspiracy, but seemed unable or unwilling to provide any details.
Sarah promised to address the matter in her speech, but in the end she just made the obliquest of references to it.