Adverb
untiringly (comparative more untiringly, superlative most untiringly)
In an untiring manner.
He is survived by his wife Raye, son David, daughter Katharine and grandson Elijah, and good friend Alang Badeli who cared for him untiringly in his final years. Source: Internet
“Mother Teresa untiringly invites us to draw from the source of love: Jesus crucified and risen, present in the sacrament of the Eucharist,” the pope wrote. Source: Internet