牵马到河易，强马饮水难

You can lead a horse to water, but you can't make him drink. (idiom)

to lead along / to pull (an animal on a tether) / (bound form) to involve / to draw in

surname Ma / abbr. for Malaysia 馬來西亞|马来西亚[Ma3 lai2 xi1 ya4]

horse / CL:匹[pi3] / horse or cavalry piece in Chinese chess / knight in Western chess

to (a place) / until (a time) / up to / to go / to arrive / (verb complement denoting completion or result of an action)

to reach; to arrive / to leave for; to go to / to (a place); until (a time); up to (a point) / (verb complement indicating arriving at a place or reaching a point) / considerate; thoughtful; thorough

river / CL:條|条[tiao2],道[dao4]

easy / amiable / to change / to exchange / prefix corresponding to the English adjective suffix "-able" or "-ible" / abbr. for 易經|易经[Yi4 jing1], the Book of Changes

surname Qiang

stubborn / unyielding

strong / powerful / better / slightly more than / vigorous / violent / best in their category, e.g. see 百強|百强[bai3 qiang2]

to force / to compel / to strive / to make an effort

variant of 強|强[jiang4]

variant of 強|强[qiang2]

variant of 強|强[qiang3]

old variant of 飲|饮[yin3]

to drink

to give (animals) water to drink

drinking water

surname Shui

water / river / liquid / beverage / additional charges or income / (of clothes) classifier for number of washes

difficult (to...) / problem / difficulty / difficult / not good

disaster / distress / to scold