One should carefully avoid the following types of statements: [...] 2. Historical In place of the statement: Since '-ik' is derived from 'ikak' 'bad', it adds an unfavorable idea to the stem with which it occurs. Use: 'ikak' ∞ '-ik' 'bad'. [...] The allomorphic relationship of these morphemes should be stated without reference to the history. If the meaning is 'bad,' we assume that this sememe will be a part of any expression containing the morpheme.
- Nida (1949), a pag.241