indubious /in-dūˈbi-əs/ (archaic)

1. Not dubious
2. Certain

• unseeable
• unseeded
• unseeing
• unseel
• unseeled
• unseeling
• unseels
• unseeming
• unseemings
• unseemlier
• unseemliest
• unseemliness
• unseemlinesses
• unseemly
• unseen
• unseens
• unsegmented
• unsegregated
• unseizable
• unseized
• unseldom
• unselective
• unself
• unselfconscious
• variolates