2 Chron. 13:1 KJV (With Strong’s)

Nowf in the eighteenth
`asar (Hebrew #6240)
ten (only in combination), i.e. -teen; also (ordinal) -teenth
KJV usage: (eigh-, fif-, four-, nine-, seven-, six-, thir-)teen(-th), + eleven(-th), + sixscore thousand, + twelve(-th).
Pronounce: aw-sawr'
Origin: for 6235
shmoneh (Hebrew #8083)
feminine shmonah {shem-o-naw'}; or shmownah {shem-o-naw'}; apparently from 8082 through the idea of plumpness; a cardinal number, eight (as if a surplus above the "perfect" seven); also (as ordinal) eighth
KJV usage: eight((-een, -eenth)), eighth.
Pronounce: shem-o-neh'
Origin: or shmowneh {shem-o-neh'}
shaneh (Hebrew #8141)
from 8138; a year (as a revolution of time)
KJV usage: + whole age, X long, + old, year(X -ly).
Pronounce: shaw-neh'
Origin: (in plura or (feminine) shanah {shaw-naw'}
of king
melek (Hebrew #4428)
a king
KJV usage: king, royal.
Pronounce: meh'-lek
Origin: from 4427
Yarob`am (Hebrew #3379)
(the) people will contend; Jarobam, the name of two Israelite kings
KJV usage: Jeroboam.
Pronounce: yaw-rob-awm'
Origin: from 7378 and 5971
began Abijah
'Abiyah (Hebrew #29)
from 1 and 3050; father (i.e. worshipper) of Jah; Abijah, the name of several Israelite men and two Israelitesses
KJV usage: Abiah, Abijah.
Pronounce: ab-ee-yaw'
Origin: or prolonged Abiyahuw {ab-ee-yaw'-hoo}
to reign
malak (Hebrew #4427)
to reign; inceptively, to ascend the throne; causatively, to induct into royalty; hence (by implication) to take counsel
KJV usage: consult, X indeed, be (make, set a, set up) king, be (make) queen, (begin to, make to) reign(-ing), rule, X surely.
Pronounce: maw-lak'
Origin: a primitive root
over Judah
Yhuwdah (Hebrew #3063)
celebrated; Jehudah (or Judah), the name of five Israelites; also of the tribe descended from the first, and of its territory
KJV usage: Judah.
Pronounce: yeh-hoo-daw'
Origin: from 3034

Cross References

1-3:  Abijah succeeding makes war against Jeroboam.
4-12:  He declares the right of his cause.
13-20:  Trusting in God, he overcomes Jeroboam.
21-22:  The wives and children of Abijah.
A.M. 3046-3049.
B.C. 958-955.
in the eighteenth.
See onch.

J. N. Darby Translation

In the eighteenth year of king Jeroboam began Abijah to reign over Judah.