The word "legup" denotes support or assistance offered to someone who is struggling or seeking to advance in a particular area. Some antonyms for "legup" could include words like hindrance, barrier, obstacle, or obstruction. These words describe situations in which someone or something is actively preventing progress or making it difficult for someone to achieve their goals. Other antonyms might include indifference, neglect, or disinterest, which describe situations in which someone is simply not providing any assistance or support at all. Opposite of "legup" could also be considered as setback, handicap, or stumbling block, which represent challenges or setbacks that make it harder for someone to move forward.