hearken /härˈkn/ (archaic or literary)

1. To hear attentively
2. To listen

1. To listen to, pay attention to, heed (poetic)
2. To seek by enquiry (obsolete)

• bipartition
• bipartitions
• biped
• bipedal
• bipedalism
• bipedalisms
• bipeds
• bipetalous
• biphasic
• biphenyl
• biphenyls
• bipinnaria
• bipinnarias
• bipinnate
• biplane
• biplanes
• BIPM
• bipod
• bipods
• bipolar
• bipolar disorder
• bipolar disorders
• bipolarities
• bipolarity
• bipropellant