relentlessly

無情にも,容赦なく;執拗に

relentlessly の類語

unrelentingly, seriously, firmly, heart and soul, hard, certainly, diligently, surely, hardly, tooth and nail, necessarily, persistently, earnestly, resolutely, severely, inevitably, steadily, laboriously, hammer and tongs, patiently, decidedly, faithfully, harshly, fervently, energetically, staunchly, strenuously, doggedly, industriously, rigorously, irrevocably, rigidly, grimly, cruelly, heartlessly

例文

• The rain fell relentlessly all day long.
  雨が一日中絶え間なく降っていた。
• The tropical sun glared down relentlessly.
  熱帯の太陽は容赦なくぎらぎら照り付けた。

relentlessly の言い換えを探すには

relentlessly（無情にも）の類語・言い換え（パラフレーズ）を、日本語訳つきで関連度順に並べています。英作文の語彙を増やしたいとき、長文読解で本文と選択肢の言い換えを見抜きたいときに使えます。