Assiduous - आ सिद्धि : - aa siddhi ah.
adjective
constant in application or effort; working diligently at a task; persevering; industrious; meticulous
Etymology: from Latin assiduus, from assidere ‘be engaged in doing’ (see assess), + -ous
आ सिद्धि: - towards state of becoming perfection or master. In Sanskrit “:” can become Sibilants like श. स, and ष vowels ओ and अर् sounds and in Greek “ous” (Note ओस).
