sequential (adj) – showing a sequence, succession, or ordered pattern
BREAKDOWN: SEQU- (follow) + -ENCE (process) + -IAL (pertaining to)
— a sequence is one thing following after another; a succession
This word is built on the root SEQU-, which means to follow.
Common SEQU- words include sequel and sequence.
More esoteric SEQU- words include sequacious.