στοιχέωstoichéō

to march in (military) rank (keep step), i.e. (figuratively) to conform to virtue and piety

Greek (New Testament) · G4748

Meanings

to be in rows (of waves, plants, etc., as well as of men), to walk in line. Metaph., in late writers, to walk by rule: Acts 21:24; with dative, to walk by or in (as a rule of life), Romans 4:12, Galatians 5:25, Galatians 6:16, Philippians 3:16 (cf. συν-στοιχέω).

Same root

στοιχεῖονstoicheîon · G4747something orderly in arrangement, i.e. (by implication) a serial (basal, fundamental, initial) constituent (literally), proposition (figuratively)
συστοιχέωsystoichéō · G4960to file together (as soldiers in ranks), i.e. (figuratively) to correspond to

Where it appears

Appears 5 times in the Bible.

Acts 21:24 Go with them to the Temple and join them in the purification ceremony, paying for them to have their heads ritually shaved. Then everyone will know that the rumors are all false and that you yourself observe the Jewish laws.
Romans 4:12 And Abraham is also the spiritual father of those who have been circumcised, but only if they have the same kind of faith Abraham had before he was circumcised.
Galatians 5:25 Since we are living by the Spirit, let us follow the Spirit’s leading in every part of our lives.
Galatians 6:16 May God’s peace and mercy be upon all who live by this principle; they are the new people of God.
Philippians 3:16 But we must hold on to the progress we have already made.

Source: G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), public domain.