A set of related adjectives in the Qenya Lexicon of the 1910s: ᴱQ. qalma “deadly”, qalmea “deathly” and (archaic) †qalūmea equivalent to qalma, all based on ᴱQ. qalme or †qalume “death” (QL/76).
Neo-Quenya: Since [ᴹQ.] qualme “death” continued to appear in Tolkien’s later writings (Ety/KWAL), I’d adapt these adjectives as ᴺQ. qualmëa “deadly, deathly”, applied mainly to things apt to cause death.
An adjective for “heaving” in Oilima Markirya poem of 1931 (MC/213). Its etymology is unclear (qal- was usually associated with “death”), and in later versions of the poem was replaced by Q. amortala (MC/222).