selkieyoudaoicibaDictYouDict[selkie 词源字典]
"A mythical creature that resembles a seal in the water but assumes human form on land", From selch, variant of seal1, + -ie. More seal from Old English:Rather than signing their name, people formerly stamped a personal seal in wax on a completed letter or other document. The expressions put the seal on, ‘to put the finishing touch to something’, and set your seal to, ‘to mark something with your own distinctive character’, both derive from this. To seal something off reflects the use of seals to check that something has not been opened or disturbed. In these and related uses, seal goes back to Latin sigillum ‘small picture’, from signum ‘a sign’, the source of design (late 16th century), designate (mid 17th century), ensign (Late Middle English), insignia (mid 17th century), sign (Middle English), signal (Late Middle English), scarlet, and numerous other English words. This seal dates from Middle English. The name of the animal seal derives from Old English seolh, the source also of the selkie or silkie (mid 16th century), the mysterious seal woman of folklore.[selkie etymology, selkie origin, 英语词源]