ke'i _GAhO cmavo

open interval bracket marker; modifies intervals in non-logical connectives; exclude boundaries.

On affix form:

kecti: x₁ (person) pities/feels sorry for x₂ (person) about x₃ (abstraction).

In notes:

bi'oi'au (exp!): digit/number: interval/range indicator for significant digits (determined by lesser endpoint).
mi'i'au (exp!): digit/number: interval/range indicator for significant digits (determined by midpoint).
xau'u'oi: elliptical/vague interval endpoint status (exclusive/inclusive) marker