class1 Atmane-pada (Dha1tup. xxii, 51) स्मयते (mc. also that the rest of a word is to be suppliedति; perfect tense सिस्मिये, or सिष्मिय्/ए [page and participle सिष्मियाण्/अ confer, compare उप-√स्मि], Epic also -स्मयाम्-आस; Aorist अस्मेष्ट Bhat2t2. 259; अस्मयिष्ठास् MBh.; future स्मेता, स्मेष्यते grammar; infinitive mood स्मेतुम् ibidem; indeclinablepage and participle स्मित्वा Sa1h.; -स्मित्य, -स्मयित्य MBh.), to smile, blush, become red or radiant, shine fg-veda TS. Ka1t2h.; to smile, laugh MBh. Ka1v. etc.; to expand, bloom (as a flower) Ka1v.; to be proud or arrogant BhP. : Passive voice स्मीयते (Aorist अस्मायि), grammar : Causal स्माययति, that the rest of a word is to be suppliedते (Aorist असिस्मयत्; also स्मापयति in वि-√स्मि quod vide), to cause to smile or laugh etc.; (Atmane-pada) to laugh at, mock, despise Dha1tup. xxxii, 37 (varia lectio for स्मिट् quod vide): Desiderative सिस्मयिषते grammar : Intensive सेष्मीयते (page and participle that the rest of a word is to be suppliedयमाण Nir. viii, 11), सेष्मयीति, सेष्मेति ibidem [confer, compare Greek φιλομμειδής for φιλο-σμειδης; μεῖδος, μειδάω; Latin mirus, mirari; Slavonic or Slavonian smijati; English smile .]
Source: Monier-Williams