From Wiktionary, the free dictionary
For pronunciation and definitions of さいわい – see the following entry.
【幸い 】
[adjective] very fortunate and happy , especially as bestowed by gods , spirits , buddhas , or other entities
[adjective] favorable , ideal ( often used in polite constructions )
[adverb] fortunately , luckily , happily
[noun] very good fortune and happiness , especially as bestowed by gods , spirits , buddhas , or other entities
[noun] an occurrence of good luck or good fortune
[noun] ( derivation unknown ) the tail and back fins of a carp or other fish, as used in cooking
(This term, さいわい ( saiwai ) , is the hiragana spelling of the above term.)For a list of all kanji read as さいわい , see Category:Japanese kanji read as さいわい .)