keen, v. — (1) to utter a keen. (2) To utter with a loud wailing voice or wordless cry. (3) To mourn.

• "Crack the Skye", Mastodon
  • Chorus
• "Ataraxia", Cave In
• "feelings change", Yaeji
  • Second chorus, background vocals, especially on:
    • "... wa'ter"
    • "a-aaaaaall my chances [...] ho'Nest"
• "Strange Fruit", Billie Holiday
  • for the treeeeee to drah-AAAAAAAAAAH-ahhhh-aaahp
• "Mad", Solange, feat. Lil' Wayne
  • Lil'Wayne's "_where'd. your. love. go. WHERE'D. YOUR. LOVE. GO. where'd. your. love. go?"