Hope this is useful for those who want to dig deeper.
www.searchgodsword.org
That's the site I found Matthew 5:5 definition of gentleness which involves meakness and includes lowliness as found in the Living Translation Bible.

Strong's Number: 4239
prauþv
Original Word
Word Origin

prauþv

apparently a primary word
Transliterated Word
Phonetic Spelling

Praus

prah-ooce'
Parts of Speech
TDNT

Adjective

6:645,929
Definition

mildness of disposition, gentleness of spirit, meekness Meekness toward God is that disposition of spirit in which we acceptHis dealings with us as good, and therefore without disputing or resisting. In the OT, the meek are those wholly relying on God ratherthan their own strength to defend them against injustice. Thus,meekness toward evil people means knowing God is permitting the injuries they inflict, that He is using them to purify His elect, and that He will deliver His elect in His time. (Is. 41:17, Lu. 18:1- Translated Words KJV (3) - meek, 3;
NAS (4) - gentle, 4;