to penetrate / (transitive, law) To become legally committed to. / (transitive) To engage in a formal or informal process. / (transitive) To be relevant; to be a contributing factor in.

(intransitive but with prepositional object, literally) To enter by running. / (intransitive but with prepositional object) To collide with.

(UK, Australia, New Zealand) Get busy with; become occupied with; become immersed in. / (UK) To start eating. / (Australia) To criticise someone; tell off; to get angry at; to attack.

(idiomatic) To consider or regard; to include (as in an estimate or plan) or pay attention to; to notice; to allow for.

To move into (an object), such that one ends up inside it. / To put on (an item of clothing). / To reach into or interact with (an object).

(idiomatic) To create a predicament or problem for oneself; to do something that leaves one with no good alternatives or solutions.

To establish a connection with (something), especially in order to take advantage. / To access (a resource or object).

To go hopelessly astray.

To participate in an activity, especially a successful or attractive one.

(transitive) To go into (a cramped space); to barely fit into. / (transitive) To put on (very tight clothes).