devotion
n. uncountablen. a very strong feeling of love, loyalty, or care for someone or something. You show this when you give a lot of your time and energy to a person, a job, or a belief.
n. profound dedication, loyalty, or affection toward a person, cause, or activity. Often implies a selfless or religious commitment that manifests in consistent action.
Her devotion to her family is clear to everyone.
The scientist's lifelong devotion to cancer research eventually led to a major breakthrough in treatment.
While many admired his artistic talent, it was his unwavering devotion to the craft—practicing for hours in total isolation—that truly set him apart from his contemporaries.
From Old French devocion, from Latin dēvōtiō, from dēvōtum + -tio, from the supine of dēvoveō (“vow, devote”); equivalent to devote + -ion.
Often followed by the preposition 'to'.