The term 'untiring' is used to describe someone who is consistently hardworking and persistent. This can be seen in the crossword solutions provided, such as 'ASSIDUOUS' (9 letters), which means showing great care and attention; 'DILIGENT' (8 letters), meaning having or showing care and conscientiousness in one's work or duties; 'INDEFATIGABLE' (13 letters), meaning not easily exhaustible; 'DOGGED' (6 letters), meaning determined and resolute; 'ACTIVE' (6 letters), meaning characterized by energetic activity; 'PERTINACIOUS' (12 letters), meaning stubbornly unyielding; 'CONTINUING' (10 letters), meaning lasting or enduring without interruption; 'CONSTANT' (8 letters), meaning CONTINUING without change in function or nature; 'PERSEVERING' (11 letters), meaning CONTINUING firmly or obstinately in a course of action in spite of difficulty or opposition; 'CONTINUED' (9 letters), meaning lasting or enduring without interruption; and 'FIRM' (4 letters), meaning not easily moved or disturbed emotionally. All of these words are used to describe someone who is untiring in their efforts.