⁵ “Blessed are the gentle, for they will inherit the earth.

⁷ “Blessed are the merciful, for they will receive mercy.

⁸ “Blessed are the pure in heart, for they will see God.

⁹ “Blessed are the peacemakers, for they will be called sons of God.

¹¹ “Blessed are you when people insult you and persecute you, and falsely say all kinds of evil against you because of Me. ¹² Rejoice and be glad, for your reward in heaven is great; for in this same way they persecuted the prophets who were before you.

¹¹ “Blessed are you when people insult you and persecute you, and falsely say all kinds of evil against you because of Me. ¹² Rejoice and be glad, for your reward in heaven is great; for in this same way they persecuted the prophets who were before you.

κληρονομέω (klēronomeō) -  Thayers'

ληρονομέω, κληρονόμῶ; future κληρονομήσω; 1 aorist ἐκληρονόμησα; perfect κεκληρονόμηκα; (κληρονόμος, which see; cf. οἰκονόμος); the Sept. for נָחַל and much more often for יָרַשׁ;
1. "to receive a lot, receive by lot; especially to receive a part of an inheritance, receive as an inheritance, obtain by right of inheritance"; so, particularly in the Attic orators, with a genitive of the thing; in later writings not infrequent with an accusative of the thing (cf. Lob. ad Phryn., p. 129; Sturz, De dial. Maced. etc., p. 140; Winers Grammar, 200 (188); (Buttmann, § 132, 8)); absolutely, to be an heir, to inherit: Galatians 4:30 from Genesis 21:10.

"earth" 
(γῆ  gē) - Strong's definition
γῆ gē, ghay; contracted from a primary word; soil; by extension a region, or the solid part or the whole of the terrene globe (including the occupants in each application):—country, earth(-ly), ground, land, world.

commentary on gentle / meek by D.Guzik
To be meek means to show willingness to submit and work under proper authority. It also shows a willingness to disregard one’s own “rights” and privileges. It is one thing for me to admit my own spiritual bankruptcy, but what if someone else does it for me? Do I react meekly? This blessed one is meek:

commentary on inherit the earth/ meek by D.Guzik
b. For they shall inherit the earth: We can only be meek, willing to control our desire for our rights and privileges because we are confident God watches out for us, that He will protect our cause. The promise “they shall inherit the earth” proves that God will not allow His meek ones to end up on the short end of the deal.

i. “It looks as if they would be pushed out of the world but they shall not be, ‘for they shall inherit the earth.’ The wolves devour the sheep, yet there are more sheep in the world than there are wolves, and the sheep, continue to multiply, and to feed in green pastures.” (Spurgeon)

ii. “The meek of England, driven by their native land by religious intolerance, have inherited the continent of America.” (Bruce)

iii. “I had only to look upon it, all as the sun shone upon it, and then to look up to heaven, and say, ‘My Father, this is all thine; and, therefore, it is all mine; for I am an heir of God, and a joint-heir with Jesus Christ.’ So, in this sense, the meek-spirited man inherits the whole earth.” (Spurgeon)

iv. Through the first three beatitudes we notice that the natural man finds no happiness or blessedness in spiritual poverty, mourning or meekness. These are only a blessing for the spiritual man, those who are new creatures in Jesus.