IPA: /pərˈspɪk.ju.əs/
KK: /pɚˈspɪk.ju.əs/
Something that is clearly expressed and easy to understand.
The teacher's explanation was so perspicuous that all the students understood the topic immediately.
Perspicuous is formed from "perspicuus" (meaning clear or transparent) derived from the Latin root "perspicere" (meaning to look through or see clearly), which itself is composed of "per-" (meaning through) and "specere" (meaning to look or see). The word describes something that is clear and easy to understand, as if one can see through it clearly.
Think of something that is 'clear' ('perspicuus') and easy to 'see' ('specere') through — that's why perspicuous means clear and understandable.