14

Lasa (Wilk.) = 1 Insensitive. Of stiff or weary limbs; cf. anggota yang l. mĕnjadi lagi rasa (the numbed limbs regain their sense of feeling), [Kit. Muj. 59.]
Also of callosities forming (tumboh l.) on the back of a bullock's neck as the result of the pressure of the yoke (kayu l.).
lĕsa.

But I am really not sure what is happening in 5a (first line of stanza 5)!!

Line 1: It could be tertambari. Tambar means medicine/antidote/cure. It maybe could be related to tawar?
Line 5: Sabak gerengseng could instead be sabuk geringsing. Sabuk means sash while geringsing is compound word made from 2 words: gering (sick/ill/pain) and sing (not). The geringsing is a pattern present in Javanese batik and Balinese textiles which is believed to have miraculous healing and protective as understood by the name itself (geringsing = to not be ill)

Seperti tiada tertambari - as if without antidote/medicine
Works really well!

Line 5: yes, sabuk/sabok is sash.

sabok
1 a sort of kerchief or plaid worn over the shoulder
sabok DjVu
1 [Javanese] Sash; broad band of rich cloth
(chindai or pĕtola) worn by warriors of old romance ([Ht. Sh. ,] [Ind. Nata ]); by being wound in many folds round the body, it gave some protection against cuts. The s. is still met with in Java and Patani; it is used also with pendent ends that are swayed by dancing girls (illustrated Raffles pl. xx); and for special types of sash see sampur and sembong.
And it turns out that there is a special kind of kain called gerengseng (or geringsing) wayang, illustrated with curly patterns and wayang figures!
gĕrengseng DjVu
1 A descriptive name given to "curly" patterns suggesting the frizzled hair of a Papuan or negrito. Also ([Java Malay]) gĕringsing; kĕreteng. The pattern is made up of semi-circular scales; and figures as the background of many batek motifs, e.g. the g. wayang (depicting stage-scenes against a g. background), or even special scenes, cf.: g. lĕlakon Ramayana (scenes from the Ramayana legend on a batek cloth), Perb. Java; g. wayang Raj una Tapa, g. wayang Panda wa Jaya; etc.
Also gĕrungsing; Klinkert

Perenggan 3, baris 3: (di) urainya sabuk geringsing wayang. Perenggan 6, baris 1: [?] Sang Jaka (?)/(Perjaka?) membawa air di sangku [KD: sangku - mangkuk (drpd tembaga atau kuningan) tempat membasuh tangan. Renjaka/Perjaka - orang muda (pembantu lelaki) Jaran Tamasa?

sangku DjVu
1 Flat-rimmed bowl for washing the fingers after a meal, — the water being poured over the fingers and into the sangku. S. mas: a golden bowl of this sort; [Mas. Ed. ,] [Ind. Meng. ]