s/he bumps head against something accidentally
See also: bitaakotigwaaneshin vai [BL]
imbitaakoshtigwaaneshin 1s ind; bitaakoshtigwaaneshin 3s ind; bitaakoshtigwaaneshing 3s conj; betaakoshtigwaaneshing 3s ch-conj; Stem: /bitaakoshtigwaaneshin-/