truceless

(Thuc.). without truce , (Dem., al.): .† admitting of no truce implacable II Ti 3:3

implacable, ""not to be bound by truce"".

irreconcilable

literally, without libation (which usually accompanied a treaty), i.e. (by implication) truceless

implacable, truce-breaker

ἄσπονδος, -ον (σπονδή, a libation); 1. without truce (Thuc.). 2. admitting of no truce, implacable (Dem., al.): 2Ti.3:3.† (AS)