different between sirenical vs irenical

English

siren +? -ical

sirenical (comparative more sirenical, superlative most sirenical)

Like, or appropriate to, a siren; fascinating; deceptive.
- 1603, John Marston, The Malcontent
  Here's a couple of sirenical rascals shall enchant ye.

From irenic.

irenical (comparative more irenical, superlative most irenical)

Peaceful, conciliatory; promoting peace, especially over theological or ecclesiastical disputes.
- 2003: [Andrew Marvell's] irenical moral is the interdependence, if insurmountable quarrelsomeness, of both elements in man's divided nature, rather as in a stormy marriage. — Roy Porter, Flesh in the Age of Reason (Penguin 2004, p. 40)

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