Pronunciation: [ɒpˈasɪtiz] (IPA) 
The word "opacities" is spelled with the letter "c" followed by the letter "i" and the letter "t" even though the sound is pronounced as "s". This irregularity is due to the Greek origin of the word. In the Greek language, the combination "ti" is pronounced as "s". The IPA phonetic transcription for "opacities" is /oʊˈpæsətiz/, where the "c" is pronounced as "s" and the "ti" is pronounced as "tis".
Opacities refer to the state or quality of being opaque, also known as opacity. Opaque refers to the lack of transparency, inability to transmit light, or the quality of being impenetrable or obscure. Opacity is the opposite of transparency and is associated with being non-transparent or partially transparent.
In a literal sense, opacities are typically used to describe materials, substances, or objects that do not allow light to pass through them. For example, thick frosted glass or clouded water can be described as having opacities, as they obstruct or reduce the passage of light. Opacities can also refer to the level of darkness or shade present in a material, such as in the case of tinted windows.
Figuratively, the term opacities can also be applied to describe situations, concepts, or language that lack clarity, openness, or transparency. For instance, when referring to opaque policies or opaque language, it suggests a lack of transparency or understanding. In this sense, opacities can imply hidden motives, secrets, or complexities that obstruct comprehension. It can also be used to describe situations or concepts that are difficult to perceive or comprehend due to their vagueness, complexity, or lack of clarity.
Overall, opacities refer to both the literal and figurative states of being opaque, whether it pertains to the physical obstruction of light or the lack of transparency in ideas, communications, or situations.
The word opacities is formed from the noun opacity, which originated from the Latin word opacitas. The Latin term comes from the adjective opacus, meaning shaded or dark. It further derives from the verb ob- (meaning against or in the way) and the adjective paco (which translates to to make or be thick or to make or be dense). Therefore, the etymology of opacities is closely linked to the Latin roots of opacity.
