夏, なつ
Adverb
summer
この夏最高の暑さだ。
夏, か
historical term
Xia dynasty (of China; c. 2070-1600 BCE; possibly mythological), Hsia dynasty
この夏最高の暑さだ。
夏, げ
Buddhist term
summer (on the lunisolar calendar: 16th day of the 4th month to the 15th day of the 7th month)
この夏最高の暑さだ。
夏い, なつい
Conjugated: 夏
Slang, from 夏 and 熱い
blisteringly hot, relentlessly hot, scorching
に
Particle
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), with
5. by, from
は
Particle, pronounced わ in modern Japanese
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis