obrigado

Etymology
From.

Adjective

 * 1) obliged, forced
 * 2) obliged, indebted due to a favor
 * 1) obliged, indebted due to a favor

Etymology
, past participle of.

Interjection

 * 1) thanks; thank you

Usage notes
There is variation regarding the gender-based use of the interjection. Some speakers conjugate the interjection and use only when the speaker is male, and  when female. Additionally, should be used when speaking as a group (either only males, or males and females), and  when speaking as a group of females. These two forms are rarely used. Other speakers make no distinction between and  and use the interjections interchangeably.

Adjective

 * 1) obligatory; mandatory required or commanded by authority
 * 2)  grateful, thankful
 * 1)  grateful, thankful
 * 1)  grateful, thankful

Noun

 * 1)  someone bound by a legal obligation

Noun

 * 1) a thank you instance of expressing gratitude