Your search for the postposition -chá-, -chá bunched up, bunched together, huddled has returned 3 entries
-chá- or -chá
bunched up, bunched together, huddled
Béégashii yáázh bichá ninish’aah.calf 3-bunch 3-1-put.I.SRO
I’m hog-tying the calf.
Shichá si’ą́ągo ’iiłhaazh.1-huddle 3-put-SPN-GO 1-sleep.P
I went to sleep huddled up into a ball. (YM 1987g:29)