חוּס עֲלַי יְיָ מְטוּל דְחַלָשׁ אֲנָא אַסִי יָתִי יְיָ מְטוּל דְאִתְבְּהִילוּ גַרְמָי.
1. frail | אֻמְלַל – Though in modern Hebrew the word takes the connotation of "wretched" or "miserable", in Biblical Hebrew it appears to refer to a physical weakness or languishing, often used in the context of withering vegetation (see Machberet Menachem, Rashi, Malbim). See also Radak and Metzudat Zion that it might take the meaning of "cutting off" (hence: languishing), with the latter connecting it to the noun "מילה", circumcision. It is debated whether the word acts as an adjective or a verb, as the expected form of the adjective would have been "אֻמְלָל" vocalized with a kamatz. [See discussion in Ibn Ezra and Radak.]
2. my bones are terrified | נִבְהֲלוּ עֲצָמָי – Perhaps because it is somewhat unusual to speak of bones feeling fear, some suggest that the word "bones" stands in for the entire body (Ibn Ezra and Radak). It is also possible that "נִבְהֲל" takes the connotation of "shaking from fear", and compare Shemot 15:15 and Yechezkel 26:18 where the word is parallel to verbs meaning "to tremble".