Matthew 4:23διδάσκων
Jesus went throughout Galilee, teaching in their synagogues, preaching the gospel of the kingdom, and healing every disease and sickness among the people.
Mark 1:21ἐδίδασκεν
Then Jesus and His companions went to Capernaum, and right away Jesus entered the synagogue on the Sabbath and began to teach.
Luke 4:31διδάσκων
Then He went down to Capernaum, a town in Galilee, and on the Sabbath He began to teach the people.
John 6:59διδάσκων
Jesus said this while teaching in the synagogue in Capernaum.
Acts 1:1διδάσκειν
In my first book, O Theophilus, I wrote about all that Jesus began to do and to teach,
Romans 2:21διδάσκων
you, then, who teach others, do you not teach yourself? You who preach against stealing, do you steal?

Abbott-Smith

διδάσκω
[in LXX chiefly for למד pl., also for ידע hi., ירה hi., etc. ;]
to teach (i.e. instruct) a person, teach a thing;

1. trans.: with accusative of person(s), Mat.5:2, Mrk.1:22, al.; before ὅτι, Mrk.8:31; περί, 1Jn.2:27; with inf., Luk.11:1; with accusative of thing(s), Mrk.6:30 12:14; with cogn. accusative, Mat.15:9 (LXX); with dupl. accusative, Mrk.4:2, Jhn.14:26; pass., Gal.1:12, 2Th.2:15; with dative of person(s) (like Heb., cf. Job.21:23, but prob. a vernac. usage, see Swete, in l.), Rev.2:14.

2. Absol., to teach, give instruction: Mat.4:23, Mrk.1:21, and often in Gosp., Rom.12:7, 1Co.4:17, 1Ti.2:12, al.
SYN.: παιδεύω (cf. Westc., Heb., 402; Cremer, 180).
(AS)

Sources: Abbott-Smith’s Manual Greek Lexicon of the New Testament (1922, public domain) and glosses from STEPBible TBESG (CC BY 4.0); STEPBible TAGNT (Greek New Testament, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.