1. A lack of cognitive skill
   - unskillfulness [N. Amer]

Type of: inability

• xxvi
• xxvii
• xxviii
• xxx
• xxxi
• xxxii
• xxxiii
• xxxiv
• xxxv
• xxxvi
• xxxvii
• xxxviii
• XXY
• XXY-syndrome
• XY
• xylan
• Xylaria
• Xylaria mali
• Xylaria polymorpha
• Xylariaceae
• xylem
• rydberg
• rydberg constant
• rydberg unit
• Rydberg's penstemon