遠足, えんそく
Takes suru, Intransitive
1. school trip, field trip, excursion, outing
dated term
2. long walk, excursion (on foot)
学校の遠足で奈良に行った。
は
Particle, pronounced わ in modern Japanese
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis