shaa;x-e gul junbish me;N hai gahvaarah aasaa har nafas
:tifl-e sho;x-e ;Gunchah-e gul baskih hai va;hshii-mizaaj
1) the rose-branch is in motion, like a cradle, at every breath/moment
2) {although / to such an extent} the mischievous child of the rosebud is wild-tempered
junbish : 'Moving, movement, motion; shake, vibration, trembling; agitation'. (Platts p.391)
aasaa : 'Like, resembling'. (Platts p.46)
va;hshii : 'Wild, untamed; shy; unsociable'. (Platts p.1183)
He says that since the child of the bud is innately wild, it doesn't remain still. In order to distract and quiet it, the rose-branch keeps swinging it.
Very mischievous children must be put in a cradle and continually rocked, so that they won't bring down the roof with their crying. The flower-bud too is like a very wild-tempered child; thus the flower-branch, as if continually taking care of it, keeps swaying.
SETS == BASKIH
For more on Ghalib's unpublished verses, see the discussion in {4,8x}. See also the overview index.
If you find nafas confusing, see {15,6}.
Here's an elegant use of the two possibilities of baskih , which can mean either 'although' or 'to such an extent'; on this see {1,5}. Choosing either of these two possibilities markedly reframes the relationship between the two lines. On the one hand, we could take it that 'although' the bud-child is innately wild, nevertheless every effort (including constant cradle-rocking) is continually being made too soothe the restive child. Or on the other hand, we could take it that the bud-child is wild-tempered 'to such an extent' that it continually thrashes around, making the branch sway back and forth in almost a cradle-rocking way.
The verse could also be taken as showing 'elegance in assigning a cause'. People had thought that the reason the branches of rose-bushes swayed was because of the breeze; but actually it was due (in one way or another) to the 'wild-tempered' behavior of that wild child, the mischievous rosebud.
Asi:
The branch of flowers is constantly swaying, like a cradle, and this is only because the mischievous child of the bud is extremely wild-tempered; thus in order to put it to sleep, there is this equipment.
== Asi, pp. 104-105