JMNT(i)
17 Now since some (or: if certain ones) of the branches are broken off (or: were at one point broken out of [the tree]), yet you yourself, being a wild olive tree of the field or forest, you are (or: were) grafted in within (or: among) them, you also came to be (are birthed; are become) a joint-participant (a partner taking in common together with; a co-partaker) of the Root and of the Fatness (= sap) of The Olive Tree (or: of the oil of the olive).
18 Stop boasting against (or: Do not be constantly vaunting or exulting over) the branches! Now since you are habitually boasting and exulting (priding yourself), you yourself are not bearing (supporting; sustaining; carrying) The Root, but rather, The Root you!
19 You will say (or: declare), then, "Branches are broken off (or: were broken out of [the tree]) to the end that I may be grafted in."
20 Beautifully [put]! (Ideally [said]!; Well [conceived]!) In lack of faith or trust (or: By unbelief; Because of lack of allegiance) they are broken off (or: were broken out of the midst), yet you yourself stand in faith (or: by trust; with confidence). Stop being haughty (Don't constantly have high opinions; Do not continually think lofty things), but to the contrary, [be constantly having] an attitude and mindset of respectful awe (or: [Godly] fear; healthy respect)!
21 For you see, since (or: if) God spares not (or: did not spare) the natural branches (the branches down from, or, in accord with, nature), neither will He continue sparing you!
22 Observe, perceive and consider, then, God's useful kindness (benevolent utility) and abruptness (sheer cutting-off; rigorous severity) – on the one hand upon those falling: abruptness (sheer cutting-off); on the other hand (or: yet) upon you: God's useful kindness (benign, profitable utility), provided (or: if) you should persistently remain in (or: with; by) the useful kindness (or: = continue to be kind and useful). Otherwise you, also, will proceed in being cut out!
23 Now they also, if they should not persistently remain in the lack of faith and trust (or: unbelief), they will proceed in being grafted in, for God is able (capable; is constantly powerful) to graft them back in again!
24 For since (or: if) you yourself were cut out of the olive tree [which is] wild (of the field or forest) by nature, and then to the side of nature (perhaps: = outside of, or contrary to, nature) you are (or: were at one point) grafted in – into a fine (beautiful; cultivated; garden) olive tree – to how much greater an extent (or: for how much rather) will these, the ones in accord with nature, proceed in being engrafted into their own olive tree!