The distribution of any morpheme must be given in terms of its environment, but some of its environment may be important and the rest relatively unimportant.
- Nida (1949), a pag.86

What we have done in this simple sentence is to discover the pertinent environment of each word or group of words. This sets of pertinent environments correlate with what we shall call immediate constituents [...].
- Nida (1949), a pag.87

In establishing these sets of nuclear and peripheral constituents we have been identifying the pertinent environment of each morpheme. It would be quite hopeless to describe all words such as 'formalizer' as strings of morphemes, each with an equal rank of attachment to all the other morpheme.
- Nida (1949), a pag.88

Environment is very complex and includes several significant subdivisions. These are primarily (A) nonlinguistic and (B) linguistic. The nonlinguistic environment may be divided into (1) objective and (2) subjective, and the linguistic environment into (1) structural and (2) contextual.
- Nida (1949), a pag.152