summer sky, especially clear and blazing sky

empty air / meaninglessness / (Buddhism) sunyata: emptiness, vacuity, awareness, openness, thusness / (Buddhism) void: one of the 五大 (godai, literally “great five”) and the highest of the five elements

the last volume in a two- or three-volume set

picnic

(transitive) to enjoy something / (intransitive) to enjoy oneself

past tense and perfective aspect of 楽しむ (tanoshimu) [godan]

summer (season)

the sky

something empty / ineffectual / false

by heart, from memory, by rote