Verb (5-dan, つ, transitive)
1. to keep; to preserve; to hold; to retain; to maintain; to sustain
ずっと沈黙を保っていた僕が、初めて口を開く。I, who had maintained silence all along, spoke for the first time.
Verb (5-dan, つ, intransitive)
2. to last; to endure; to keep well (food); to wear well; to be durable