illegible
- a (of handwriting, print, etc.) not legible
illegible handwriting
imaginary
- n (mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1
- s not based on fact; unreal
a small child's imaginary friends
illegitimate
- n the illegitimate offspring of unmarried parents
- s contrary to or forbidden by law
an illegitimate seizure of power - a of marriages and offspring; not recognized as lawful