amorphous
without clear shape or form
Roots
- -ous / -ious: full of or marked by a quality
- a- / an-: not, without, or lacking
- morph: form or shape
Other words with the morph root
- metamorphosis: a profound change in form
- morph: to change form
A- removes the form. Amorphous things have no settled shape, outline, or structure.
The plan stayed amorphous until someone wrote the steps on the board.
Amorphous is useful for more than physical shape. An amorphous cloud has no clear outline; an amorphous argument has no clear structure. The word works when the form is missing.