予防線を張る よぼうせんをはる Also written 予防線をはる Meanings Expression, Godan verb to take precautions; to set a guard against attack Kanji 予 pre-. Read as ヨ. 防 defend. Read as ボウ. 線 line. Read as セン. 張 stretch. Read as はる. Jinuma: Japanese Dictionary · Word lists