gradual
adjective
taking place, changing, moving, etc., by small degrees or little by little.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
To the management of the cords they owe all the vehemence of their passions and the grace of their oratory, not to mention a certain gliding, ungradual locomotion, altogether spectral.
From Venetian Life by William Dean Howells