Thiru is an honorific

Honorific

An honorific is a word or expression with connotations conveying esteem or respect when used in addressing or referring to a person. Sometimes, the term is used not quite correctly to refer to an honorary title...

 used while addressing adult males in the Tamil language

Tamil language

Tamil is a Dravidian language spoken predominantly by Tamil people of the Indian subcontinent. It has official status in the Indian state of Tamil Nadu and in the Indian union territory of Pondicherry. Tamil is also an official language of Sri Lanka and Singapore...

, being the equivalent of the English

English language

English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...

 "Mr.

Mr.

Mister, usually written in its abbreviated form Mr or Mr. , is a commonly used English honorific for men under the rank of knighthood. The title derived from master, as the equivalent female titles, Mrs., Miss, and Ms, all derived from the archaic mistress...

" or the French

French language

French is a Romance language spoken as a first language in France, the Romandy region in Switzerland, Wallonia and Brussels in Belgium, Monaco, the regions of Quebec and Acadia in Canada, and by various communities elsewhere. Second-language speakers of French are distributed throughout many parts...

 "Monsieur

Monsieur

' is an honorific title that used to refer to or address the eldest living brother of the king in the French royal court. It is also a customary French title of respect and term of address for a French-speaking man, corresponding to such English titles as Mr...

".

Thiru is a word that means "deity" otherwise called "sacred" or "holy". It is also a Tamil

Tamil people

Tamil people , also called Tamils or Tamilians, are an ethnic group native to Tamil Nadu, India and the north-eastern region of Sri Lanka. Historic and post 15th century emigrant communities are also found across the world, notably Malaysia, Singapore, Mauritius, South Africa, Australia, Canada,...

 name for the God Mahavishnu

Mahavishnu

Image:Hinducosm Map1.svg|thumb|Click an area to go there. This is one of many material universes which expand from Mahavishnu when He breathes.|300px|alt=One Brahmanda, with Garbhodakashayi-Vishnurect 216 61 277 80 Brahma...

 who is called "Thirumaal" (திருமால்)and Goddess Lakshmi

Lakshmi

Lakshmi or Lakumi is the Hindu goddess of wealth, prosperity , light, wisdom, fortune, fertility, generosity and courage; and the embodiment of beauty, grace and charm. Representations of Lakshmi are also found in Jain monuments...

 who is called "Thirumagal" (திருமகள்) in Tamil

Tamil language

Tamil is a Dravidian language spoken predominantly by Tamil people of the Indian subcontinent. It has official status in the Indian state of Tamil Nadu and in the Indian union territory of Pondicherry. Tamil is also an official language of Sri Lanka and Singapore...

. It is also meant for "wealth", "respect", and "name" in Tamil language.

The word "Thiru" is part of city-names, such as Trivandrum or Thiruvananthapuram

Thiruvananthapuram

Thiruvananthapuram , formerly known as Trivandrum, is the capital of the Indian state of Kerala and the headquarters of the Thiruvananthapuram District. It is located on the west coast of India near the extreme south of the mainland...

; Thiruchendur

Thiruchendur

Thiruchendur Murugan Temple is a Hindu temple dedicated to Lord Muruga and one of the Arupadaiveedu of Lord Muruga. It is located in the small town of Thiruchendur in the district of Tuticorin, Tamil Nadu, India. It is 55 km south-east of Tirunelveli, 40 km from Tuticorin and 75 km...

, Thiruvaiyaru

Thiruvaiyaru

-External links:**...

, Thiruvenkadam, Thirumalai

Thirumalai

Thirumalai is a Tamil film which released on 24 October 2003 and was directed by Ramana. This film has Joseph Vijay in the main lead, with Jyothika. Lawrence Raghavendra and Kiran Rathod make special appearances in the film.-Plot:...

, Thirupathi, Thiruchirappalli, Thirukoilur, Thirukumaran,Thiruvannamalai etc. - - the list is endless; the word forms part of the name of many other cities and towns in South India.