observable C2+ Topic:Numbers & Quantity US /əbˈzɝvəbəl/ UK /əbˈzɜːvəbəl/ See IPA manual Meanings 1 adj able to be seen or noticed; in physics, a measurable quantity There was no observable change in the patient's condition overnight. Thesaurus Synonyms 1 adj · able to be seen or noticed;... noticeableperceptibledetectablediscerniblevisibleapparentevident ↔ Opposites imperceptibleinvisibleundetectablehidden Word family Derived forms observablyobservability Related forms observeobservationobserverobservant Etymology AI details From observe (from Latin observare, 'to watch, heed') plus the suffix -able; observare is from ob- ('over') plus servare ('to keep, watch'). observare Latin servare Latin View etymology graph -> Topics Numbers & Quantity Word Formation & Derivatives External links Cambridge Dictionary Wiktionary Google Images # observable **Type:** Word **Level:** C2+ **Part of speech:** adj **IPA (US):** /əbˈzɝvəbəl/ **IPA (UK):** /əbˈzɜːvəbəl/ ## Meanings 1. able to be seen or noticed; in physics, a measurable quantity ## Examples - There was no observable change in the patient's condition overnight. ## Synonyms - noticeable - perceptible - detectable - discernible - visible - apparent - evident ## Antonyms - imperceptible - invisible - undetectable - hidden ## Derived Forms - observably - observability ## Related Forms - observe - observation - observer - observant ## Roots and Affixes - Root: observare - Root: servare ## Etymology From observe (from Latin observare, 'to watch, heed') plus the suffix -able; observare is from ob- ('over') plus servare ('to keep, watch'). ## AI Etymology Observable is from observe (from Latin observare, 'to watch, heed') plus the suffix -able; observare is from ob- ('over') plus servare ('to keep, watch'). Important recorded forms include observare (Latin) and servare (Latin). The modern sense follows that older lexical line closely. In current use it covers able to be seen or noticed; in physics, a measurable quantity. The wider family includes derived forms such as observably and observability and related words such as observe, observation, observer, and observant. ## Topics - Numbers & Quantity - Word Formation & Derivatives markdown