1. At the proper time
   "she was duly apprised of the raise"
   - punctually 
2. In a due, fit, or becoming manner; as it ought to be; properly

See also: due

• Hidatsa
• hidden
• hidden agenda
• hidden reserve
• semi-wild
• semiabstract
• semiannual
• semiannually
• semiaquatic
• semiarid
• semiautobiographical
• semiautomatic
• semiautomatic firearm
• semiautomatic pistol
• semibreve
• semicentenary
• semicentennial
• semicircle
• semicircular
• semicircular arch
• semicircular canal
• semicolon
• semicoma
• semicomatose
• semiconducting