"slain" in the noun sense
people who have been slain (as in battle)
"slain" in the verb sense
1. murder, slay, hit, dispatch, bump off, off, polish off, remove
kill intentionally and with premeditation
"The mafia boss ordered his enemies murdered"
"slain" in the adjective sense
killed `slain' is formal or literary as in "slain warriors"
"a picture of St. George and the slain dragon"
Source: WordNet® (An amazing lexical database of English)
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