보

Protection

보안 = the preservation of public peace
보호 = protection
보험 = insurance
보관(하다) = custody, have a thing in one´s keeping
담보 = security, mortgage
보건소 = public health center
아동 보호 = child protection

Report

예보 = forecasting

일기예보 = weather forecast

경보 = alarm, warning
정보 = information
보고(하다) = report

보고서 = written report, paper

보도(하다) = report, notify

홍보(하다) = public relations
속보 = newsflash

Fill

보충(하다) = supplement
보강(하다) = reinforcement
후보 = candidate, candidacy
보조(하다) = assistance, support, assist

보정(하다) = revision

양보(하다) = make a concession

Step

보행기 = baby walker
초보/초보자 = beginner
도보 = going on foot
횡단보도 = crosswalk

약

Weak

강약 = strength and weakness
약점 = weak point (점 = point)
약(하다) = to be weak
노약자 = old and weak people (giving up your seat for people on public transport (노약자석 = seat for old and weak people))

Contract

약속(하다) = promise, appointment (속 = bind)
약혼(하다) = mariage engagement (약혼자/약혼녀 = fiancé (male/female))
계약 = contract
예약(하다) = make a reservation (예 = before)
요약(하다) = summarize, summary

Medicine

약 = medicine
약국 = pharmacy
약사 = pharmacist
약대/약학대학 = college of pharmacology
마약 = Drug
독약 = Poison, poisonous drug

강

River

한강 – Han River
강남 – South of the river
강북 – North of the river
강가 – Riverside,Riverbank 가 (edge, verge, rim)
강변 – Riverside,Riverbank 변 (side)
강변도로 – Riverside road 도로 (road)
강둑 – River embankment
강물 – River water
강줄기 – River course

Strong, force

강하다 – to be strong
강화하다 – strengthen
강도 – intensity, strength
강도 – robbery
강조하다 – emphasising
강간 – rape
강제 – compulsion, constraint
강제로, 강제적으로 – by force
강요하다 – compel
강약 – strength and weakness
강대국 – powerful country
보강하다 – reinforcement
강풍 – strong wind
최강 – the strongest

Lecture, discuss

강의(하다) – lecture
강사 – instructor, lecturer
강단 – lecture platform
수강(하다) – take a course
강의실 – lecture room
보강(하다) – supplementary lecture
개강(하다) – open a course
종강(하다) – finish a course

Come down

강수량/강우량 – rainfall, precipitation
강설량 – snowfall
강하(하다) – fall, drop, descend