dense

Synonyms: close closeknit compact condensed crammed crowded heaped heavy impenetrable jammed jampacked massed opaque packed packed like sardines piled solid substantial thickset

Antonyms: open scattered sparse thin uncompressed

Synonyms: blockheaded boorish doltish dull dumb fatheaded ignorant imbecilic impassive lethargic numskulled oafish obtuse phlegmatic simple slowwitted sluggish stolid thick torpid

Antonyms: brainy clever intelligent smart