Thick (adjective / adverb) — سميك أو غليظ: Of great depth; dense; stupid (informal). Below are 7 words with a similar meaning; the linked ones have full GL Dictionary entries with their meaning in Arabic.
closely compacted in substance; having the constituent parts crowded closely together; difficult to understand because of complexity or obscurity; stupid or…
having little light or brightness; not clearly visible or distinguishable due to lack of illumination; lacking clarity, vividness, or sharpness; weak in…