たゆみない
弛みない
tayuminai

i-Adjective

1. unslacking; unceasing

Usually Written in Kana
イベントが成功せいこうしたのは貴殿きでんのたゆみ努力どりょく献身けんしんのおかげです。
ibentoga sēkō shita nowa kidenno tayumi nai doryokuto kenshinno okagedesu.
It was your tireless efforts and devotion that made the event successful.
Other forms: