Vocabulary consisting only from characters you are able to read
観察
kansacu
observation, surveysuru
赤み
akami
reddish tinge/tinge of red/slight redness/blushmix
船底
sentei; funazoko
ship's bottom, bilge; ship's bottom, bilgemix
速やか
sumijaka
speedy, prompt, smoothmix
練る
neru
(1)to knead, to work over, (2)to polish up (e.g. a plan), (3)to drill, to train godan, verb, vtrans