Keep up

Pronunciation: [kip-up]

Kind of word: Phrasal verb

Formal definition:

"to perform as swiftly or successfully as others: to persevere; continue; to maintain in good condition or repair; to stay informed"

Informal definition:
"continue at the same rate"

Examples:

• She easily kept up with the rest of the runners
• He liked to keep up old cars.
• He kept up with all the latest sports events.

Related words:

• hold out
• hold up
• last
• conserve
• maintain
• prevail
• survive

Song/video:

https://www.youtube.com/watch?v=14XvW8FByGE

Link to another dictionary

http://www.merriam-webster.com/dictionary/keep%20up

KNOWLEDGEABLE ABOUT 

      

Pronunciation: [nol-i-juh-buh l uh-baut]

Kind of Word: adjective.

Formal definition: possessing or exhibiting knowledge, insight, or understanding.

Informal definition: Have the inteligence and know about a topic or something.

Example: 

I’ts important for some people being knowledgeable about wines.

Related words: 

• intelligent
• well-informed
• discerning
• perceptive.  

Video link:

https://www.youtube.com/watch?v=sVnlheOXoKM

Link to another dictionary: 

http://dictionary.reference.com/browse/knowledgeable?s=t

Knock

Pronunciation: nɒk
 
kind of word: Noun and verb

 Formal definition: to strike with a hard blow; to affect in a specified whay by striking hard.

Informal definition: Giving a blow or repeated blows
 
Examples

• Knocked him on the head
• Knocked the muggers sensesless

Synonym:

• blow  
• coup 
• hit 
• stroke 
• strike 
• knock

Song/Video
 https://youtu.be/2pfx4dutNUA