a target, a mark, a bullseye / an objective, an object (of doing something)

set of problems

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

unthinkable, out of the question

practical question (problem)

observatory (place where celestial bodies are observed)

(informal, of women's fashion) to appeal / be attractive to men

(informal, of women's fashion) appealing / attractive to men

利得: gain, profit, benefit

得: profit / 匿: shelter / 徳: virtue