Unpretentious in nature

• In a humble manner
• Of humble status
• Humble in position, as a worker
• Base
• "Moo," said Elsie ___

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Lowly \Low"ly\, a. [Compar. Lowlier ; superl. Lowliest .] Not high; not elevated in place; low. ``Lowly lands.'' --Dryden. Low in rank or social importance. One common right the great and lowly claims. --Pope. Not lofty or sublime; humble. These ...

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
adjective COLLOCATIONS FROM CORPUS ■ NOUN position ▪ In the end she'd been too good for her lowly position . status ▪ Some parasites admit their lowly status and creep into the body of their host. ▪ If a flagrant oversight like this could occur it says ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
c.1300 (adv.); late 14c. (adj.) "humble," from low (adj.) + -ly .

Wikipedia Word definitions in Wikipedia