IshDan 102(29) :ܪܒ ܡܗܝ̈ܡܢܐ܂ ܗܢܘ܂ ܪܫܢܐ ܕܫܪܝܪ̈ܐ܂ ܡܗܝ̈ܡܢܐ ܕܝܢ ܒܬܪ̈ܝܢ ܙܢܝ̈ܐ ܡܬܐܡܪܝܢ܃ ܫܪܝܪ̈ܐ ܐܘ ܡܣܪ̈ܣܐ‏ : chief of the trustees [MT ‏רַב סָרִיסָיו], that is to say chief of the š-officials, for the word mhymn is said of two kinds, š-officials and literal eunuchs
See the entire entry for mhay/ēman adj. trustworthy, faithful

IshDan 102(29) :ܪܒ ܡܗܝ̈ܡܢܐ܂ ܗܢܘ܂ ܪܫܢܐ ܕܫܪܝܪ̈ܐ܂ ܡܗܝ̈ܡܢܐ ܕܝܢ ܒܬܪ̈ܝܢ ܙܢܝ̈ܐ ܡܬܐܡܪܝܢ܃ ܫܪܝܪ̈ܐ ܐܘ ܡܣܪ̈ܣܐ‏ : chief of the trustees, that is to say chief of the š-officials, for there are two types of trustees, š-officials and eunuchs
See the entire entry for šarrīr adj. firm, true