pathological liar
You can call them George Costanza.
a lair
NO if someone is telling you a lie they are just trying to be really sneaky. never believe lies
A person who hates lies is often referred to as someone who is truthful, honest, or sincere. They may also be called straightforward or candid.
Diminishes value of what's spoken.
A person who lies only when necessary can be described as a "compulsive liar" or "occasional liar."
It depends on the liar. Some people who weave multiple lies around themselves might get lost in the fantasy that they are real and convince themselves of them. This is more likely to be the case if the lies are to make themselves look better than they are or feel more important. It is less likely in the case of someone simply lying to get out of trouble. For instance if someone lies and says they were at work while they were really cheating on a spouse, its highly unlikely that they believe this lie. But if someone says they are well traveled when they have never left their town, they might, after telling multiple stories about their adventures, start to feel and believe them, themselves. One set of lies is purely selfish. The other is mainly based on low self esteem.
A person who always lies is often referred to as a "compulsive liar" or a "pathological liar." This behavior may stem from various psychological factors or conditions.
Someone who lies almost anything, even the smallest things.
A person who constantly lies is typically referred to as a pathological liar or a compulsive liar. They may have a condition called pseudologia fantastica, which is a psychological disorder that prompts individuals to compulsively lie.
Enabler. They are helping or enabling the person to continue their destructive behavior. Both need help. The person who is enabling and the person who is drinking. AnswerCodependent.
Hmm... a socialpath is someone who lies at will without normal remorse. They lie so many times that they have corrupted and burned their conscience into submission. It is common in cases of adultery, where the offending partner has betrayed their spouse, their children, their friends and anyone they are hiding their adultery from with an almost infinite layer of lies. They tell these lies so frequently they start to believe them themselves. They will even rewrite their history in their own mind, to justify their activity, demonize their spouse and justify their lies. It is a form of addiction and insanity. It is VERY common when confronted that they will first turn the accusations back onto the other person and accuse them of lying and being crazy. Unless a person at this stage gets a very serious wake-up call to jolt their conscience back to life, the relationship with their spouse will often deteriorates to the point of divorce. Sorry if this has happened to you--it is a sad situation.