solar

solar = sol<sun> + ar<adjective suffix>

• sol (from Latin sol, meaning "sun")
• ar (Latin-derived suffix forming adjectives, often indicating relation or pertaining to)

Etymology Origin:
The word solar traces back to Latin solaris, derived from sol (sun). It entered English via Old French solaire in the late 15th century, retaining its core meaning of "pertaining to the sun." The suffix -ar (from Latin -aris) is a common adjectival ending, reinforcing the word’s descriptive function. The logical progression—from the Latin root for "sun" to its modern usage in terms like solar energy—reflects humanity’s enduring focus on the sun as a celestial and energy source.