dunno /də-nōˈ/ informal contraction of (I) don't know

• second person
• second-rate
• second-rater
• second-raters
• second reading
• Second Reich
• second row
• second-row
• second rows
• seconds
• second self
• seconds hand
• seconds hands
• second sight
• second-sighted
• seconds pendulum
• seconds pendulums
• second storey
• second storeys
• second strike
• second-strike
• second strikes
• second string
• second strings
• second supine