to participate / to take part / to join

to raise / to increase

gas station

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

to exert (effort or pressure)

to intensify

to speed up / to expedite

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 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

to process / processing / working (of machinery)

additional / annex

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

to add / to increase

more (than sth else) / even more

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

Singapore

to reinforce (a structure) / to strengthen

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

Gabon

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

Canada / Canadian

Katō (Japanese surname)

to accelerate / to speed up

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

all the more / even more / further

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

to encrypt / encryption / to protect with a password

Bengal / Bangladesh

to heat

to work overtime

to work extra hours / to do overtime

Tonga, South Pacific archipelago kingdom

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 crown / coronation

Bulgaria

to superimpose / to layer / to overlay / to superpose

Madagascar

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)

bonus point; extra credit / to award bonus points; to earn extra points

Chicago, USA

Jamaica

Senegal

Calcutta (India)

Stuttgart city in southwest Germany and capital of Baden-Württemberg 巴登·符騰堡州｜巴登·符腾堡州

to injure

to lengthen

Las Vegas, Nevada

to double / to redouble

Costa Rica

California

to make text bold

Kathmandu, capital of Nepal

Bucharest, capital of Romania

acceleration

Dominica / Dominican Republic

Lake Baikal

Bangalore, capital of southwest Indian state Karnataka 卡納塔克邦｜卡纳塔克邦

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

to seal (with an official stamp) / to stamp / (fig.) to ratify / to put a lid on (a cooking pot) / to cap / to build an extension or additional story

moreover / in addition to that

Jakarta, capital of Indonesia

Caribbean

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

Caracas, capital of Venezuela

Alaska, US state

If you want to condemn sb, don't worry about the pretext (idiom, from Zuozhuan 左傳｜左传); one can always trump up a charge against sb / Give a dog a bad name, then hang him.

Nicaragua

to increase a price

to intensify / to speed up / to step up

Catalonia

addition

Jiagedaqi district of Daxing'anling prefecture 大興安嶺地區｜大兴安岭地区, in northwest Heilongjiang and northeast Inner Mongolia

Bugatti (name) / Bugatti Automobiles S.A.S. (French car company)

to pressurize / to pile on pressure

Galicia, province and former kingdom of northwest Spain

(math.) to weight / weighting / weighted (average, index etc)

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

see 精誠所至，金石為開｜精诚所至，金石为开

Picasso

Caucasus / Caucasian

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

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

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

Canada

Agatha Christie

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

lit. contribute bricks and tiles for a building (idiom) / fig. to do one's bit to help

(sports) overtime / extra time / play-off

widen

fuel nozzle

Kuala Terengganu, capital of Terengganu state, Malaysia

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

to impose / to force upon

vodka (loanword)

gallon (loanword)

to add material to an exam / supplementary exam

to spur the horse to full speed (idiom) / to go as fast as possible

extremely difficult / even more difficult