Fitly joined - compacted (συναρμολογούμενον - συμβιβαζόμενον)
The present participles denote present, continuous progress. The two participles represent respectively the ideas of harmony or adaptation and compactness or solidity. See on Act 9:22, and see on Col 2:2.
By that which every joint supplieth (διὰ πάσης ἁφῆς τῆς ἐπιχορηγίας)
Lit., through every joint of the supply. For joint, see on Col 2:19; for supply, see on 2Pe 1:5. The supply specifies it as peculiarly Christ's. The phrase joint of the supply signifies joint whose office or purpose it is to supply. Construe with the two participles, as Col 2:19.
According to the working
Construe with maketh increase.
In the measure of every part
According as each part works in its own proper measure.
Maketh
Notice the peculiar phrase; the whole body maketh increase of the body. It is a living organism, and its growth is produced by vital power within itself.
In love
As the element in which the upbuilding takes place. Compare Eph 3:17-19.