天马行空

like a heavenly steed, soaring across the skies (idiom) / (of writing, calligraphy etc) bold and imaginative / unconstrained in style

day / sky / heaven

celestial horse (mythology) / fine horse / Ferghana horse / (western mythology) Pegasus

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

row / line / commercial firm / line of business / profession / to rank (first, second etc) among one's siblings (by age) / (in data tables) row / (Tw) column

to walk / to go / to travel / a visit / temporary / makeshift / current / in circulation / to do / to perform / capable / competent / effective / all right / OK! / will do / behavior / conduct / Taiwan pr. [xing4] for the behavior-conduct sense

empty / air / sky / in vain

to empty / vacant / unoccupied / space / leisure / free time