editable 

Having the ability to change or conform.

Spreadsheet fields that can be changed are known as editable fields.

editable by Marcus Or Not September 5, 2006

Evitable 

Able to be avoided, evaded, or escaped; Uncertain; Unnecessary; Not necessarily sure to occur, happen, or come; Alterable.

The evitable result of life is death. Assuming you are immortal.

Evitable by Cody Schatzle October 17, 2007