Ihärdig, assiduous.

Ihärdighet, perseverance.

Ijåns, lately, of late.

Ila, to hurry, to haste.

Illa, ill, bad.

Illamående, indisposed.

Illfundig, wily, guileful, crafty.

Ilska, rage, fury.

Imma, steam, vapor.

In, in.