astound    kujoreza, kujegezagutangāza, kwūmiza
En-En dictionary 
speechless    (to be, in defeat, surprise, misfortune) kwūmirwa
(to be with shame or fear) gutētērwa
(to be with surprise or defeat) kujorerwa, kujumarara
(to leave one ~, astound) kujoreza
(to render) kwūmiza
En-En dictionary 
akūmiza   7  class 7
singular: aka-,aga-
  
(no pl.) astonishment, astounding thing, miracle
bitangāje   phr    fantastic, astounding, amazing, astonishing, bewildering, stunning, breathtaking, sensational, remarkable, spectacular, extraordinary, wonderful, marvelous (from gutangāza)
gutangāra (-tangāye)     v    to marvel, to be astonished, to be amazed, to be astounded
gutangāza (-tangāje)     v    1. to amaze, astound, astonish, 2. to surprise, 3. to impress
gutangāzwa (-tangājwe)     v    to be amazed, astounded
kujegeza (-jegeje)     v    1. to silence one's opponent by speaking the truth, 2. to astound, astonish, 3. to roll about (vt), 4. throw down, 5. to surprise
kujoreza (-joreje)     v    to astound, leave one speechless
astounding    (thing) akūmiza
En-En dictionary