soulful (adj.)youdaoicibaDictYouDict[soulful 词源字典]
"full of feeling," 1860, from soul (n.1) + -ful. Meaning "expressive of characteristic Black feeling" is from 1964 (see soul (n.2)). Earlier as a noun (1640s), "as much as a soul can hold."[soulful etymology, soulful origin, 英语词源]