兩虎相爭，必有一傷

if two tigers fight, one will get injured (idiom) / if you start a war, someone is bound to get hurt

two / both / some / a few / tael, unit of weight equal to 50 grams (modern) or 1⁄16 of a catty 斤[jin1] (old)

tiger / CL:隻|只[zhi1]

each other / one another / mutually / fret on the neck of a pipa 琵琶[pi2 pa5] (a fret on the soundboard is called a 品[pin3])

appearance / portrait / picture / government minister / (physics) phase / (literary) to appraise (esp. by scrutinizing physical features) / to read sb's fortune (by physiognomy, palmistry etc)

two tigers fighting (idiom); fierce contest between evenly matched adversaries

to vie against one another / to fight each other / mutual aggression

to strive for / to vie for / to argue or debate / deficient or lacking (dialect) / how or what (literary)

certainly / must / will / necessarily

to have; there is / (bound form) having; with; -ful; -ed; -al (as in 有意[you3 yi4] intentional)

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

to injure / injury / wound