無風三尺浪

lit. large waves in windless conditions (idiom) / fig. trouble arising unexpectedly

three / 3

one of the characters used to represent a musical note in gongche notation, 工尺譜|工尺谱[gong1 che3 pu3]

a Chinese foot / one-third of a meter / a ruler / a tape-measure / one of the three acupoints for measuring pulse in Chinese medicine / CL:支[zhi1],把[ba3]

wave / breaker / unrestrained / dissipated / to stroll / to ramble

not to have / no / none / not / to lack / un- / -less

wind / news / style / custom / manner / CL:陣|阵[zhen4],絲|丝[si1]