amorphous

Etymology

From Ancient Greek ἄμορφος (ámorphos, “without form, shapeless, deformed”) (itself from ἀ- (a-, “without”) + μορφή (morphḗ, “form”) + -ous.

adj

1. Lacking a definite form or clear shape.
   The enormous pile of spaghetti landed on the floor in an amorphous heap.
2. (by extension) Being without definite character or nature.
   Gudrun, new from her life in Chelsea and Sussex, shrank cruelly from this amorphous ugliness of a small colliery town in the Midlands. Yet forward she went, through the whole sordid gamut of pettiness, the long amorphous, gritty street. 1920, D.H. Lawrence, chapter 1, in Women in Love
3. (by extension) Lacking organization or unity.
4. (physics) In the non-crystalline solid state of a typically crystalline solid.
5. (set theory, of a set) Infinite and not the disjoint union of two infinite subsets.