αὐτόματος autómatos

Meaning

self-moved ("automatic"), i.e. spontaneous

In the King James Version: of own accord, of self

Derivation: from G846 (αὐτός) and the same as G3155 (μάτην);

Where it is used

• Mark 4:28 All by itself the earth produces a crop—first the stalk, then the head, then grain that ripens within.
• Acts 12:10 They passed the first and second guards and came to the iron gate leading to the city, which opened for them by itself. When they had gone outside and walked the length of one block, the angel suddenly left him.