bad (at), poor (at), weak (at), uncomfortable with / hard to get along with (of a person)

weak point

slow; dimwitted (of a person)

slowness; dimwittedness (of a person) / dimwit

(software engineering) class diagram - A type of static structure diagram that describes the structure of a system by showing the system's classes, their attributes, and the relationships between the classes.

first, number one / game, round

most, -est, -most

(Kagoshima, dialect) most / (Kagoshima, dialect) first

a (single) pair, couple, brace (male-female pair of animals) / (gagaku, bugaku, dance) a style of performance consisting of pairs of left and right dances

mathematics (field of study)