ˈtʃeɪn(d)ʒlɪŋ ˈt͡ʃeɪnd͡ʒlɪŋ ˈkɹɛtɪn ˈkɹiːtɪn diːˈsɛləɹeɪt dɪˈleɪ dəˈleɪ ˈɪd.i.(j)ɪt ɪmbəˈsiːl ˈɪmbəsɪl ˈmɔːɹɒn ɹɪˈtɑː(ɹ)d ɹɪˈtɑː(ɹ)d sləʊ sloʊ cause to move more slowly or operate at a slower rate This drug will retard your heart rate lose velocity; move more slowly The car decelerated slow the growth or development of The brain damage will retard the child's language development be delayed a person of subnormal intelligence