To enter into (an activity), to participate (construed with in).
To enter into conflict with (an enemy).
To come into gear with.
To draw into conversation.
To mesh or interlock (of machinery, especially a clutch).
To attract, to please; (archaic) to fascinate or win over (someone).
To guarantee or promise (to do something).
To engross or hold the attention of; to keep busy or occupied.
To arrange to employ or use (a worker, a space, etc.).
To bind through legal or moral obligation (to do something, especially to marry) (usually in passive).
To enter into battle.
To cause or engage (someone or something) to participate or to become connected or implicated.
To take in; to gather in; to mingle, blend or merge.
To comprise or include; to have as a related part.
To complicate or make intricate.
To envelop, enfold, entangle.