to participate / to take part / to join

to raise / to increase

gas station

to exert (effort or pressure)

(idiom) to make matters even worse / to add insult to injury

to intensify

Singapore

to become a member / to join / to mix into / to participate in / to add in

to add something extra / an additional increment / addendum / to append / an additional posthumous title

Canada (abbr. for 加拿大) / surname Jia

to add / plus / (used after an adverb such as 不, 大, 稍 etc, and before a disyllabic verb, to indicate that the action of the verb is applied to sth or sb previously mentioned) / to apply (restrictions etc) to (sb) / to give (support, consideration etc) to (sth)

to heat

to become a member of an alliance or union / to align / to join / participate

Dominica / Dominican Republic

more (than sth else) / even more

to add oil / to top up with gas / to refuel / to accelerate / to step on the gas / (fig.) to make an extra effort / to cheer sb on

to speed up / to expedite

plus / to put in / to add / to add on / to add into / in addition / on top of that

Canada / Canadian

to accelerate / to speed up

to load (cargo) / (computing) to load (content)

Edgar Allen Poe (1809-1849), American poet and novelist

Bengal / Bangladesh

additional / annex

to reinforce / to strengthen / to increase

to make heavier / to emphasize / (of an illness etc) to become more serious / to aggravate (a bad situation) / to increase (a burden, punishment etc)

to work overtime

in addition / moreover / (used before a disyllabic verb to indicate that the action of the verb is applied to sth or sb previously mentioned) / to apply (restrictions etc) to (sb) / to give (support, consideration etc) to (sth)

Agatha Christie

California

to ratchet up / to raise (expectations etc) / to increase (a quota, a position in the market etc) / to up the ante / (computing) to encode

Bulgaria

moreover / in addition to that

in addition / extra

Ghana

lit. to add oil and vinegar / fig. adding details while telling a story (to make it more interesting)

to double / to redouble

to reinforce (a structure) / to strengthen

Bucharest, capital of Romania

Chicago, USA

Gatling (name) / Richard J. Gatling (1818-1903), inventor of the Gatling gun

to make text bold

to injure

to raise salary

to add up (numbers) / (fig.) to put together (several things of the same type, e.g. skills)

acceleration

lit. change to more severe (idiom); to become more intense (esp. of shortcoming) / to aggravate / to intensify

to increase a price

Nicaragua

Caracas, capital of Venezuela

Jamaica

Gabon

to increase (e.g. one's effort)

Alaska, US state

to add / to increase

to raise interest rates

Dominican Republic (Tw)

addition

(of two or more things) to occur at the same time; to be mingled; to accompany each other

to process / processing / working (of machinery)

Senegal

intensive care (in hospital)

Dominica / Dominican Republic (Tw)

Jakarta, capital of Indonesia

to crown / coronation

to increase a bet; to raise (poker); to raise the stakes

Caucasus / Caucasian

franchise store

to expedite / (of a delivery etc) expedited / express / urgent

to feed in / to load (raw material, supplies, fuel etc) / to supply / fortified (with added material)

to heat / to add warmth / to raise temperature / fig. to stimulate

to deepen

to work extra hours / to do overtime

additive / food additive

Costa Rica (Tw)

Ouagadougou, capital of Burkina Faso

(botany) coca (loanword)

Edgar (name)

Alaska, US state

Gary (name)

potassium (loanword)

to pressurize / to pile on pressure

Costa Rica

Canada

(Tw) (vaccine) booster dose / booster shot

Tonga, South Pacific archipelago kingdom

addition, subtraction, multiplication and division: the four basic operations of arithmetic

vodka (loanword)

(vaccine) booster shot

surcharge

Caribbean Sea

(in former times) coming-of-age ceremony at 20 years

to intensify / to speed up / to step up

Luke / St Luke the evangelist

Bangladesh (formerly East Pakistan)

Gospel according to St Luke

Tonga, South Pacific archipelago kingdom (Tw)

all the more / even more / further

accelerator (computing) / particle accelerator

sternly / strictly / harshly / stringently / rigorously