ga'o GAhO cmavo

closed interval bracket marker; mod. intervals in non-logical connectives; include boundaries.

On affix form:

ganlo
x1 (portal/passage/entrance-way) is closed/shut/not open, preventing passage/access to x2 by x3 (something being blocked).

In notes:

xau'u'oi (exp!)
elliptical/vague interval endpoint status (exclusive/inclusive) marker