Tril is a slang term used to describe a person who is not reliable. This word has multiple synonyms that can be used in different contexts. One of the commonly used synonyms for tril is 'untrustworthy.' This term is used to refer to a person who cannot be relied upon for a specific purpose. Another synonym for tril is 'deceitful.' This word is used to describe a person who is dishonest and manipulative. Additionally, 'unreliable' is another synonym for tril, which can be used to refer to someone who is not consistent in their actions or behavior. Other synonyms for tril include 'dishonorable,' 'unscrupulous,' and 'shady'.