уменьшительный означает в английский

diminutive▼(serving to diminish)
adjective
[UK: dɪ.ˈmɪ.njʊ.tɪv] [US: də.ˈmɪ.njə.tɪv]

hypocoristic▼(relating to a nickname, usually indicating intimacy)
adjective
[UK: hˌaɪpəʊkərˈɪstɪk] [US: hˌaɪpoʊkɔːrˈɪstɪk]