a constant source of annoyance or trouble
絶え間ない迷惑や問題の原因 (taemai naimeiwaku ya mondai no gen'in)
"The trade dispute has become a thorn in our side."
"貿易争議は私たちの側の棘になってしまいました。" (bōeki sōgi wa **watashitachi no kawa no toge** ni natte shimaimashita.)
to establish a standard or example for future actions
something or someone that looks pitiful or regrettable
a small problem that is exaggerated
to be more successful or prepared than others
something very beautiful or skillfully made
having the responsibility or burden of something