| idle(adjective, quiet, flat, indifferent, apathetic) |
| impotent |
| inactive(adjective, quiet, indifferent, apathetic, lifeless) |
| incompetent |
| indifferent(adjective, quiet, apathetic, lifeless, inactive) |
| ineffective |
| inept |
| inert(adjective, quiet, indifferent, apathetic, lifeless) |
| intimidated(adjective, weak, nervous, shy, meek) |
| introvert(adjective, modest, nervous, humble, hesitant) |
| laid-back(adjective, quiet, indifferent, apathetic, lifeless) |
| latent(adjective, quiet, flat, indifferent, apathetic) |
| lifeless(adjective, quiet, indifferent, apathetic, inactive) |
| loner(adjective, modest, nervous, humble, hesitant) |
| low-profile(adjective, soft, shy, meek, frugal) |
| maidenlike(adjective, soft, shy, meek, frugal) |
| meager(adjective, soft, shy, meek, frugal) |
| mean(adjective, soft, shy, meek, frugal) |
| mild |
| milky(adjective, soft, shy, meek, frugal) |