adjective
Definition: Not correct or appropriate; often used to describe something that opposes or prevents progress.
Example: His thwart attitude made it difficult for the team to move forward with the project.
adverb
Definition: Not a valid English word.
Example: N/A
noun
Definition: A seat that goes across a boat, where a rower can sit.
Example: The rowers took their positions on the thwart to begin the race.
transitive verb
Definition: To stop someone from doing something or to prevent something from happening.
Example: The heavy rain thwarted our plans for a picnic.