unpleasant β not pleasant; displeasing; disagreeable; offensive: an unpleasant taste; an unpleasant situation; an unpleasant manner.
unrelenting β not relenting; not yielding or swerving in determination or resolution, as of or from opinions, convictions, ambitions, ideals, etc.; inflexible: an unrelenting opponent of the Equal Rights Amendment.
unsparing β not sparing; liberal or profuse; excessive.
vengeful β desiring or seeking vengeance; vindictive: a vengeful attitude.
seasoned β one of the four periods of the year (spring, summer, autumn, and winter), beginning astronomically at an equinox or solstice, but geographically at different dates in different climates.
accustomed β If you are accustomed to something, you know it so well or have experienced it so often that it seems natural, unsurprising, or easy to deal with.
habituated β to accustom (a person, the mind, etc.), as to a particular situation: Wealth habituated him to luxury.
prepared β properly expectant, organized, or equipped; ready: prepared for a hurricane.
steeled β any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying according to composition and heat treatment: generally categorized as having a high, medium, or low-carbon content.
contemptuous β If you are contemptuous of someone or something, you do not like or respect them at all.
disdainful β full of or showing disdain; scornful.
impenetrable β not penetrable; that cannot be penetrated, pierced, entered, etc.
impious β not pious or religious; lacking reverence for God, religious practices, etc.; irreligious; ungodly.
unashamed β not ashamed; not restrained by embarrassment or consciousness of moral guilt: a liar unashamed even after public disgrace.
repent β to feel sorry, self-reproachful, or contrite for past conduct; regret or be conscience-stricken about a past action, attitude, etc. (often followed by of): He repented after his thoughtless act.
unsubmissive β inclined or ready to submit or yield to the authority of another; unresistingly or humbly obedient: submissive servants.
brutish β If you describe a person or their behaviour as brutish, you think that they are brutal and uncivilised.
intolerant β not tolerating or respecting beliefs, opinions, usages, manners, etc., different from one's own, as in political or religious matters; bigoted.
hard-core β unswervingly committed; uncompromising; dedicated: a hard-core segregationist.
militant β vigorously active and aggressive, especially in support of a cause: militant reformers.
staunch β firm or steadfast in principle, adherence, loyalty, etc., as a person: a staunch Republican; a staunch friend.
uncompromising β not admitting of compromise or adjustment of differences; making no concessions; inaccessible to flexible bargaining; unyielding: an uncompromising attitude.
unyielding β unable to bend or be penetrated under pressure; hard: trees so unyielding that they broke in the harsh north winds.
adamant β If someone is adamant about something, they are determined not to change their mind about it.
stand pat β exactly to the point or purpose; apt; opportune: a pat solution to a problem.
astute β If you describe someone as astute, you think they show an understanding of behaviour and situations, and are skilful at using this knowledge to their own advantage.