IPA: /ˈtɛnθli/
KK: /tɛnθli/
In the position of tenth; used to indicate the order of something that is tenth in a series.
The team finished tenthly in the competition this year.
Tenthly → It is formed from "tenth" (from Old English "teoþa", meaning the ordinal number for ten) and the suffix "-ly" (meaning in a manner of). The word "tenthly" means in the manner of the tenth item or point.
Think of the word 'tenth' as referring to the number ten, and remember that 'tenthly' means discussing something in the manner of the tenth point.