WordNet sense 1 (characterized by directness in manner or speech; without subtlety or evasion):

blunt, candid, frank, outspoken, plainspoken, point-blank, free-spoken, straight-from-the-shoulder

WordNet sense 2 (extended senses; direct in means or manner or behavior or language or action):

direct

WordNet sense 3 (directly and without evasion; not roundabout):

forthrightly, squarely