| hot(adjective, active, occupied, running, alive) |
| in a job(expression, adjective, busy, occupied, working) |
| in collar(expression, adjective, active, busy, occupied) |
| in force(expression, adjective, running, alive, functioning) |
| in full swing(expression, adjective, idiom, active, occupied) |
| in gear(expression, adjective, active, occupied, running) |
| in place(expression, adjective, active, busy, occupied) |
| in process(expression, adjective, active, running, alive) |
| in the know(expression, adjective, idiom, careful, aware) |
| inked(adjective, active, busy, occupied, working) |
| intense |
| intentive |
| jazzed(adjective, sharp, bright, lively, alert) |
| know all the answers(expression, adjective, idiom, careful, knowledgeable) |
| know ins and outs(expression, adjective, idiom, careful, knowledgeable) |
| knowing(adjective, careful, knowledgeable, cautious, aware) |
| knowledgeable(adjective, careful, cautious, aware, attentive) |
| laboring(adjective, active, busy, occupied, running) |
| listening(adjective, considerate, responsive, aware, helpful) |
| lively(adjective, sharp, bright, alert, aware) |