弦；缰绳；引申为牵制控制的英文

rein

• 弦:    bowstring; string ...
• 缰绳:    rein; jerk line; h ...
• 引申:    extend in meaning; ...
• 为:    support; stand for
• 牵制:    pin down; tie up; ...
• 控制:    control; dominate; ...