The term 'hard conditions' can be summarized by the crossword solution 'rigors'. Rigors are difficult or harsh conditions that require a great deal of effort and determination to overcome. They often involve physical, mental, or emotional strain, and can be found in many different contexts. For example, military training often involves rigorous physical and mental exercises, while academic studies may require long hours of studying and memorization. In any case, rigors are difficult conditions that require a great deal of dedication and perseverance to overcome.