insufficient, inflammable, inadvertent, inadequite, insecure, indelible, inaudible
The prefix bi- means two, twice, or double. Words that start with bi- are bicycle, bisexual, bipedal, bicentenary, bipolar, bicoloured, bicephalous, etc. All words beginning with the letters bi: bi...
hendecasyllabic hendecahedron etc etc there should be 11 in all
Grapholite, graphologic(al), grapholog(y/ist), graphomania, graphomotor, graphophobia, graphophone, graphophonic, graphorrhea
-untidy -unfortunate -unfriendly