| even-tempered(calm, sound, reasonable, sensible, rational) |
| exercised(adjective, skilled, experienced, seasoned, applied) |
| experiential |
| expert(adjective, smart, familiar, sophisticated, wise) |
| field |
| fit(adjective, good, reasonable, useful, valuable) |
| friendly(adjective, useful, beneficial, advantageous) |
| functioning(adjective, running, alive, working, serviceable) |
| gainful(adjective, near, nearby, convenient, lucrative) |
| good for(expression, useful, beneficial, advantageous) |
| hands on |
| imperturbable(adjective, calm, sensible, dark, restrained) |
| important(adjective, useful, beneficial, advantageous) |
| in action(expression, adjective, idiom, useful, realistic) |
| in operation(expression, adjective, useful, realistic, workaday) |
| in the know(expression, idiom, familiar, sophisticated, wise) |
| ingenious |
| instrumental(adjective, good, useful, valuable, helpful) |
| invaluable(useful, effective, beneficial, advantageous) |
| lucid(adjective, calm, sensible, dark, restrained) |