思索しさく
shisaku

Noun
Suru Verb

1. speculation; thinking; meditation

Transitive
かれらはその体系たいけい大変たいへん思索しさく労力ろうりょくついやして仕上しあげた。
karerawa sono taikēo taihenna shisakuto rōryokuo tsuiyashite shiageta.
They worked out the system with much thought and labor.