2
For two things (actor muɴ- & theme) especially of the same kind to join each other (loc ref), as described above.
For someone (agent muɴ-; s agent maN-) to join two things (theme -on), especially of the same kind, by putting them side-by-side, as described above.
For someone (agent muɴ-) to add something (theme i-) to something else (loc ref -an) by joining, to extend the length of the latter, as described under 1.