Complex sentence which includes one prepositional phrase.

1. albeit, Conjunction 

Def - Although

Sentence - Although the dress, with its bright colors, was beautiful, it was too big for her.

2. bereft, Adj 

Def - Lacking something important.

Sentence - Because he was bereft of energy, he struggled to finish the long workout.

3. gratis, Adverb 

Def - Free of charge.

Sentence - Since they gave out snacks at the event, many people lined up to get them gratis.

4. intercession, Noun 

Def - Stepping in to help someone.

Sentence - After she had an intercession with the school board, kids received better lunches.

5. lineaments, Noun 

Def - Distinct features of a face.

Sentence -As the sunlight shone on his sharp jawline, it highlighted his lineaments.

6. presage, Verb

Def - A warning of something to come.

Sentence -  Since dark clouds in the sky presage a heavy storm, we decided to stay indoors.

7. prodigal, Adj

Def - Wasteful with money.

Sentence -  Although his prodigal spending on useless gadgets was fun, it quickly emptied his wallet.

8. prolixity, Noun 

Def -  Using too many words.

Sentence -Since the lectures about history had a lot of prolixity, the students failed.

9. sinecure, Noun

Def - : A job with little work but good pay.

Sentence - While he enjoyed his sinecure in a small office, he often felt unchallenged.

10. solicitous, Adj

Def - Showing care or concern.

Sentence -   Since she was solicitous toward her sick friend, she brought her soup.