Phonology

Consonant clusters with a single point of articulation are geminated. For instance, a word-final k followed by a word-initial g would be pronounced [kːg] (note the lack of the usual aspiration) since both are velar. In contrast, the ⟨k⟩ in ⟨-k t-⟩ is aspirated since ⟨t⟩ is alveolar.

A plosive-fricative cluster with a single point of articulation becomes an affricate. t and d, which normally denote alveolar plosives, shift their point of articulation before dental or post-alveolar fricatives to assimilate with the fricative.

The clusters tl and dl become the lateral affricates [t͡ɬ] and [d͡ɮ], respectively. Similarly, in some dialects, sl and zl become the lateral fricatives [ɬ] and [ɮ].

Phonotactics

Najan is monosyllabic, with C(C)V(C)(C) structure. Within an onset or coda, any plosives, fricatives, and taps must all be voiced or all be voiceless. For example, ⟨ts-⟩ and ⟨tl-⟩ are valid, but ⟨tz-⟩ is not.

Stress

Najan uses a stress accent system, with stressed words receiving greater volume, a longer vowel, and higher tone. Najan is also stress-timed, with stressed words occurring at relatively constant intervals. Typically, verbs are stressed and particles unstressed, except for emphasis.