ショウ 
め.す 
() summon () invite
 
めしあがる (v5r,vt) (hon) to eat
めす (v5s,vt) (1) (hon) to call, to invite, to send for, to summon, (2) to eat, to drink, (3) to put on, to wear, (4) to ride, (5) to catch (a cold), to take (a bath), to tickle (one's fancy), to put on (years), to commit (seppuku), (6) to do, (7) (arch) honorific suffix used after the -masu stem of a verb
しょうかん (n,vs,adj-no) summons
しょうしゅう (n,vs) convening, calling together (e.g. parliament)

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Etymologies: 中文字譜 : 説文解字