Lackadaisically is an adverb meaning 'in a lackadaisical manner, ' which is defined as being listless, indifferent, or apathetic. It is derived from the phrase 'lackadaisy, ' which is used to describe someone who is not paying attention or is not interested in what is going on around them. The crossword solutions for the term lackadaisically are IDLY, which is an adverb meaning 'in an idle manner, ' or without purpose or direction.