Hilarious

Pronunciation: /hɪˈlɛərɪəs/

Kind of word: Adjective

Formal definition:

"extremely amusing and causing a lot of laughter"

Informal definition:

very funny

Examples:

• Some people don't like his comedy, but i think he's hilarious

Related word:

• Funny
• Hysterical
• Priceless
• Screamingly funny

Song/video:

https://www.youtube.com/watch?v=towFQL1tC_k

Link to another dictionary:

http://www.wordreference.com/definition/hilarious

Haunting

Pronunciation: ˈhɑːn.t̬ig

Kind of word: Adjective

Formal definition: 
Poignant and evocative; difficult to ignore or forget.

Informal definition: 
A person who does not ignore.

Related words:  

• evocative

• emotive

• affecting

• moving

• touching 

• stirring

Example: 

• This haunting song was a brilliant musical evocation.

Song or video:

https://www.youtube.com/watch?v=yr7VWpxmkkg

 

Another link:  

http://dictionary.cambridge.org/es/diccionario/ingles/haunting

Harassment

Prounciation: həˈras mant

kind of word: Noun

Formal definition: aggressive pressure or intimidation.
 
Informal definition: a bullying person.

Example: they face daily harassment by the police

Synonym:

• persecution
• intimidation
• pressure
• force
• coercion
• hassle

Song or video:

https://www.youtube.com/watch?v=Lw8_592R63I

Hideout

Pronunciation:\ˈhīd-ˌau̇t\

Kind of word: Noun

Formal definition:

"a place where someone (such as a criminal) hides to avoid being found or captured"

Informal definition:

"a place of refuge"

Examples:

• The police easily tracked him to his hideout.
• Police found the stolen jewels under the floorboards in the thief's hideout, a cabin deep in the woods.

Related words:

• Lair
• Refuge
• Bolt-hole
• Cache
• Hideway
• Hidey hole
• Hiding place

Song/video:

https://www.youtube.com/watch?v=oD6EyMHhc0w

Link to another dictionary:

http://www.wordreference.com/definition/hideout

Hand down

Pronunciation: hænd-daʊn

Kind of word: Verb

Formal definition: To deliver; pronounce; to transmit, pass along in turn

Informal definition: Instill respect, fear or awe

Examples

• The judge handed down the decision: He handed it down
• She wanted to hand down the traditions of her church to her grandchildren

Synonym: 

• dictate 
• hand down

Song/Video: 
https://www.youtube.com/watch?v=LlqkQRQSn40

Harmonious

Pronunciation: (hahr-moh-nee-uh s) 

Kind of word: Adjective

Formal definition:
Something that is pleasant to the ear; tuneful; melodious.

Examples:

• The different parts of the picture form a harmonious whole.
• A harmonious arrangement of colours.

Related Words:

• Congenial
• Congruent
• Discordant

Song/Video:

https://www.youtube.com/watch?v=5pBLXIE-nPk

Link other dictionaries/sites:

http://www.vocabulary.com/dictionary/harmonious?family=HARMONIOUS

Hazardous   

Pronunciation: [haz-er-duh s]
Kind of word: Adjective

Formal definition:
"Risky, dangerous"

Informal definition: 
It could be an action or something that involve a danger level or something badly that put in risk the peoples life.

Example:

• The space shuttle disasters of 1986 and 2003 show how hazardous space travel is.  

Related words

• Dangerous
• Unsafe
• Perilous
• Precarious
• Faught with danger
• Unpredictable

Song/Video 

https://www.youtube.com/watch?v=A_aPgPq6hMM

Link to another dictionary:
http://dictionary.reference.com/browse/hazardous?s=t