not subject to change or variation especially in behavior | having or feeling no doubt or uncertainty; confident and assured |
relating to a person who does something regularly | certain to occur; destined or inevitable |
marked by firm determination or resolution; not shakable | exercising or taking care great enough to bring assurance |
securely in position; not shaky | reliable in operation or effect |
not liable to fluctuate or especially to fall | physically secure or dependable |
not easily excited or upset | certain not to fail |
| infallible or unfailing |
| (of persons) worthy of trust or confidence |
| impossible to doubt or dispute |